"Brain x Psychology 'Business Hacks'" [Season 1-4] How '100 yen a day' changes perception... A mechanism to ease mental burden
[Psychological Effect in this episode] The Pennies-a-Day Effect
[Key Point of the Effect] A psychological effect where breaking down a payment into a daily amount makes it feel less burdensome than the total sum.
☑️ Click here for character settings and the blueprint for the 200-episode total
📢 Announcement | We are entering the 2026 Creative Awards
Jiro:
"F-finally...! We've decided to enter our story into the #CreativeAwards2026
#WorkFictionCategory...! My finger is shaking just pressing the entry button, like it's my first day on the job...!"
Hana:
"You don't need to have your finger go back to your first day of work (laughs).
But, I want more people to watch over Jiro-kun as he stumbles through his sales job and grows little by little, so for a limited time,
we are releasing 'up to Episode 8 of Season 1,' which was originally planned for paid access, for free!"
Seiji:
"This story is about Jiro, who, triggered by the doubts and failures he feels in his sales job,
gradually deciphers 'the reasons why people's hearts are moved.'"
Dr. Narita:
"Among Jiro's failures and realizations, there will surely be moments where you think, 'This might be true for me too.'"
Jiro:
"From here, our story begins.
I'll probably stumble many times, and Hana-san will call me out on it many times...!
But, every time that happens, I want to learn a little bit and grow.
If you think 'This is interesting,' 'I'm curious about what happens next,' or 'I want to support them,', it would be a huge encouragement if you could
support us with a Like, comment, or share...!
Please watch over our story together!"
[The Goal of this Note Article]
"Why does it suddenly seem doable when someone says '100 yen a day'?"
This time, we will decipher such a 'relatable experience' together through Jiro's failure.
Following the flow of looking at 'initial standards' in Season 1-1, 'how numbers appear' in Season 1-2, and 'how things are arranged' in Season 1-3,
this episode looks at how the mental burden changes depending on 'what unit you use to convey the same amount of money.'
Rather than just talking about making the amount look small, we will look together at whether it is in a form that the other person can properly visualize in their own life or work.
[Introduction] Jiro is pushed forward by 100 yen a day
Lunch break.
Jiro put away his smartphone with a slightly awkward look on his face.
Hana:
"What's wrong?"
"You have the face of someone who 'started something properly but isn't keeping it up' today."
Jiro:
"...Yes."
"That's very much the case..."
Seiji:
"Did something happen?"
Jiro:
"Last month, I was looking at the gym's sign-up page..."
"When I saw 3,000 yen a month, I thought, 'This might be a bit expensive...'"
Hana:
"Yeah, yeah."
"At that price, you'd hesitate a bit, right?"
Jiro:
"Yes..."
"But after that, it said, 'You can attend for 100 yen a day!' and..."
Hana:
Oh, there it is.
The thing where you hesitate at a monthly price, but when they say '100 yen a day,' it suddenly seems doable.
Jiro:
That's exactly it...!
The voice in my head starts saying, 'If it's 100 yen, it's basically 0 yen...'
Before I knew it, I had signed up...
Hana:
It's not 0 yen, you know (laughs).
Jiro:
Yes...
But I haven't gone even once yet...
Now I've become 'someone who pays 3,000 yen a month to rest...'
Hana:
That's a bit sad (laughs).
Jiro:
Yes...
In my mind, I've gone a few times, but my body hasn't changed at all...
Hana:
Only your mind is getting ripped first (laughs).
I bet there are quite a few people who are like, 'That's me...'
Seiji:
Yeah, that's a very natural reaction.
You're probably experiencing the 'Pennies-a-Day' effect.
Jiro:
Pennies-a-Day...?
Is that a relative of Happy Birthday...?
Hana:
Don't turn this into a celebration all of a sudden (laughs).
[Term Explanation] Why did that happen?
Seiji:
The names are a bit similar, I guess (laughs).
The 'Pennies-a-Day' effect means that even for the same amount of money, if it's broken down into a unit that's easier for the other person to process, like 'per day,' the burden feels lighter.
Jiro:
A unit that's easier to process...
Seiji:
Exactly.
If it stays at 3,000 yen a month, it looks like a lump sum and feels a bit heavy.
But when it becomes '100 yen a day,' it becomes easier to accept, thinking, 'I can probably do that.'
Hana:
I see...!
The amount hasn't changed, but the 'way of receiving it' has changed.
Seiji:
Yes, exactly that.
People tend to feel that large numbers are heavy when taken at face value, but when they are converted into units that are easy to imagine in daily life, they feel much more relatable.
Jiro:
So for me...
It wasn't so much that I thought it got cheaper, but that it looked like a 'size I could keep up with'...
Hana:
That's pretty close.
Seiji:
Yeah.
This effect isn't about 'anything is fine as long as you break it down.'
What's important is 'whether you can properly imagine it in that unit.'
Jiro:
I see...!
So that's why '100 yen a day' worked, but if someone told me 'it's 0.001 yen per second,' I probably wouldn't get it at all...
Hana:
“Yeah, that’s too detailed, it actually makes it harder to imagine (laughs).”
[Sales Application] How does this work in sales?
Little by little, Jiro’s mind begins to connect the gym talk to his work.
Hana:
“Does that happen in sales, too?”
Seiji:
“Yeah, it happens quite a lot.”
“But the important thing here isn’t just that you should break it down into small pieces.”
Hana:
“Oh.”
“This is starting to feel a bit more practical than what we were talking about earlier.”
Seiji:
“For example, even for the same amount of money, there are times when it’s better to receive it as a ‘monthly fee,’ and other times when ‘per day’ or ‘per use’ gets the point across better.”
“In other words, it’s important to look at which unit the other person can easily imagine within their own life or work.”
Jiro:
“I see…!”
“So, it’s not about ‘just making it as small as possible’…”
“It’s about making it into a ‘form that the person can easily imagine as their own’…!”
Seiji:
“Yeah, exactly.”
“For example, if it’s a service they use every day, ‘per day’ might be natural.”
“But if it’s something they only use once a month, ‘per use’ might be easier to grasp.”
Hana:
“That’s true.”
“It’s more important that it’s something they can picture in their daily life than just how ‘small’ it is.”
Seiji:
“Exactly.”
“The important thing isn’t to make it look cheap, but to make the other person feel that ‘that burden is realistic.’”
Jiro:
“I see…!”
“Then for my next proposal… I’ll break it down to per second!”
Hana:
“You haven’t learned anything from that at all (laughs).”
Seiji:
“The idea is close, but if you go that far, it actually becomes harder to imagine.”
“The important thing isn’t ‘being detailed,’ it’s ‘being relatable.’”
Jiro:
“Ah…”
“I thought again that just breaking it down was enough…”
Hana:
“It’s how you break it down that matters, Jiro (laughs).”
Seiji:
“So, there’s one thing to keep in mind for practical application.”
“Can the other person truly imagine that unit as something relevant to their own life?”
Jiro:
“Not ‘making it look small,’ but ‘making it into a form they can imagine’…”
“This time, I’ll definitely use a unit that gets the point across…!”
[Case Study] What this looks like in the field
From here on, we will look at how the Pennies-a-Day effect works in the field, while changing the scenery little by little.
The point this time is not just to make the amount smaller, but tochange it to a unit where the other person feels ‘that burden is something I can imagine’.
[Case 1] When a regular office coffee service becomes easier to approve as a benefit by framing it as '40 yen per cup'
First, let's look at a case that is easy to visualize in a work setting.
Here, the decision moves forward because the daily perspective of '40 yen per cup' is seen, rather than the lump sum of '9,600 yen per month'.
Hana:
'This is also a company benefit, right?'
'The kind where you hesitate when you hear the monthly fee, but it suddenly feels realistic when it's 'per cup'.
Jiro:
'It is...!'
'Actually, there was a situation like that in the department where my colleague works a little while ago...'
Seiji:
'Oh, what kind of story?'
Jiro:
'It seems like a lot of opinions were gathered in a workplace improvement survey saying they wanted office coffee...'
'A regular service for 9,600 yen a month was put forward as a candidate.'
Hana:
'Yeah, when you hear 9,600 yen a month, you think about it for a second.'
Jiro:
'Yes...'
'The department manager also said at first that it was a bit expensive...'
Seiji:
'Yeah.'
Jiro:
'My colleague explained, 'This comes with 20 bags, and you can drink 12 cups from one bag, so it's about 40 yen per cup'...'
Hana:
'Oh, that's easier to accept.'
Jiro:
'And when he said, 'Isn't it good if everyone's motivation goes up a little for 40 yen a cup?''...'
Seiji:
'Yeah.'
Jiro:
'The manager said, 'That's good,' and became quite positive about it...'
Hana:
'That's a good way to convey it, and a good reaction (laughs).'
Seiji:
'Yeah.'
'What's happening here isn't just breaking down the amount.'
'It's significant that they visualized the daily scene of 'the workplace atmosphere getting a little better for 40 yen a cup'.'
Jiro:
'I see...!'
'And that colleague didn't just make the numbers smaller...'
'He also showed the future workplace atmosphere along with it...'
Hana:
'That's a big deal.'
Jiro:
'And that manager, while listening to the explanation...'
'It seems he was smiling a little bit...'
Hana:
'You were watching that (laughs).'
Jiro:
"Yes..."
"But the decision was quite positive...!"
[Case 2] When the introduction effect becomes easier to imagine by breaking it down to "per person per day" for a business improvement tool that consolidates daily reports, attendance, and applications
Changing the mood a bit, let's talk about business improvement in the same department this time.
Here, the point is that by changing the unit, it doesn't just look "cheap," but the future after implementation becomes visible as well.
Hana:
"Was there anything else in that department?"
Jiro:
"There was...!"
"This time, it's about a business improvement tool that can consolidate daily reports, attendance, and applications..."
Seiji:
"Oh, that's quite work-oriented."
Jiro:
"Yes..."
"Apparently, when they first looked at just the monthly cost, the atmosphere was like, 'Hmm...'"
Hana:
"Yeah, even if a business tool is convenient, it's easy to get stuck if only the price is presented first."
Jiro:
"But my colleague said, 'If you look at it as per person per day, it's about this much...' and..."
"Apparently they said, 'If input and confirmation time is reduced, and sales staff can make even one more visit, it can be recovered...'"
Seiji:
"That's good."
"That's a very easy explanation to grasp."
Hana:
"Indeed, 'how much per month' feels heavy, but if it's 'this much per person per day, and that much time is saved,' you can see the benefits after implementation."
Jiro:
"Yes...!"
"My colleague didn't just break it down to 'per person per day'..."
"They also showed what would become easier beyond that..."
Seiji:
"Yeah, that's what's important."
"What's big here isn't that it 'looked cheap.'"
"It's that they could see how the field would become easier with that burden."
Jiro:
"I see...!"
"When you can see 'what becomes easier with that burden,' even the way it's received changes."
Seiji:
"Yeah, that understanding is quite good."
Jiro:
"And apparently, it got quite a bit of attention within the company after that..."
"It seems it will be introduced in all departments starting next month...!"
Hana:
"Oh, wow!"
"That means they were highly evaluated."
Jiro:
"Yes..."
"That department manager... although he was a little bit smug..."
"The decision to implement it was quite amazing...!"
Seiji:
"It's good that you can distinguish between those two things (laughs)."
Hana:
"But still... the manager made a good decision, but actually, isn't your colleague's 'way of conveying it' quite skillful?"
Jiro:
“............Ah”
[Case 3] Housekeeping services: When “per visit” is easier to fit into your life than “monthly”
Let's step away from the work atmosphere for a moment and move into a daily life scenario.
This case is quite close to a “model example” within our discussion today.
This is because by changing the unit, a “large expense” starts to look like a “helpful one-time event.”
Hana:
“This happens with things like housekeeping services, too.”
“When you hear ‘it’s 12,000 yen a month,’ you get a bit defensive, but when you hear ‘it’s about 3,000 yen per visit because it’s 4 times a month,’ it suddenly becomes easier to think about.”
Seiji:
“That’s true.”
“Especially with housekeeping, it’s easier to imagine ‘getting help once on a tough day’ than ‘paying for a whole month at once.’”
Jiro:
“I get it......!”
“‘Paying 12,000 yen’ feels a bit big, but......”
“‘3,000 yen for one visit, and my room gets a bit tidier’ makes it suddenly fit into my life......!”
Hana:
“Exactly.”
“It makes a big difference when something that was a ‘large expense’ starts to look like ‘a single instance of relief.’”
Seiji:
“The important thing here isn’t just that you made it smaller.”
“It’s that you could see ‘how that one time helps in your own life.’”
Jiro:
“I see......!”
“So it’s not so much that it ‘looked cheap,’ but that I could ‘see the situation where it helps’......!”
Hana:
“Yeah, that’s a very good understanding.”
[Case 4] Learning services: When you thought ‘per day’ sounded doable, but you almost finished without using it
Here, we will look at a failure story where someone started thinking ‘this seems doable,’ but couldn’t actually use it up.
The important thing is to ‘use units that convey meaning,’ and the perspective is that ‘making it look small isn’t the same as winning.’
Hana:
“Conversely, there are times when you sign up thinking ‘this seems doable for XX yen a day,’ but you end up not using it much......”
Seiji:
“That happens.”
“The ‘pennies-a-day’ effect is good at easing the sense of burden at the entrance, but whether you ‘actually continue’ is a different story.”
Jiro:
“............”
Hana:
“Hmm?”
Seiji:
“That silence gives me a bad feeling.”
Jiro:
“Yes......”
“That story just now was about me......”
Hana:
“I knew it! (laughs)”
Jiro:
"I joined a learning service before, but..."
"When I saw 'You can learn for 120 yen a day,' I thought, 'That's very affordable!' and started it..."
Seiji:
"Yeah."
Jiro:
"But I didn't open it for about three weeks..."
"Before I knew it, I had become 'someone being watched over for 120 yen a day'..."
Hana:
"Someone being watched over (laughs)."
"The service is the one worrying about you, Jiro."
Seiji:
"That's also an important point."
"Feeling that something is 'easy to get into' and 'whether you can actually keep it up' are two different things."
Jiro:
"I see...!"
"Even if I thought, 'I can manage it on a daily basis'..."
"I should have looked at whether I would really do it every day separately...!"
Hana:
"Yeah."
"It's true that the burden looks smaller."
"But in the end, it's better to look at whether you can imagine yourself continuing at that unit."
[Case 5] When looking at an outsourced sales flyer service on a 'per day' basis makes it easier to get approved as an internal investment
Finally, that department manager makes a reappearance.
Here, the story of 'units that convey meaning' we've looked at so far comes into play in a slightly different way.
Even though no one explained it on the spot, the way of communicating we looked at before can remain in people's judgment process.
Hana:
"Come to think of it, what happened to that department manager after that?"
Jiro:
"Oh..."
"Actually, they were even more active after that...!"
Seiji:
"Oh, I'm curious."
Jiro:
"There was a day when my colleague was printing sales flyers, stuffing them into envelopes, and preparing them for shipment..."
"Their desk was quite cluttered with paper..."
Hana:
"Wow, that sounds tough."
Jiro:
"Yes..."
"Then that manager said, 'Can't we improve the overall efficiency of this?'..."
"And they found a service that could handle design, printing, and shipping all at once."
Seiji:
"Huh, they're quite proactive."
Jiro:
"Yes...!"
"At first, when they consulted the president, they were told, 'No, isn't that a bit expensive?' but..."
Hana:
"Uh-huh."
Jiro:
"That's when the manager said, 'If you look at it on a daily basis, it's about this much'..."
"And they apparently explained, 'Instead of spending time on printing and shipping in-house like we are now, if we can spend that time on sales and customer service, it will lead to more revenue, right?'..."
Seiji:
"I see."
"They didn't just make the amount look smaller, they made it visible what would be returned for that burden."
Hana:
'That's powerful.'
'Instead of thinking about whether it's expensive or cheap, you can think about how much efficiency will improve for that amount of daily burden.'
Jiro:
'Yes...!'
'Then the boss said, "In that case, let's try it," and it seems he gave the OK...!'
Hana:
'Oh!'
Seiji:
'Even here, by changing the unit to "per day," I think it became easier to imagine not just the size of the burden, but also the changes in operations.'
Jiro:
'I see...!'
'It wasn't just making it look small, it was about making it possible to see what happens after it's implemented...!'
Seiji:
'Yeah, that difference is huge.'
Jiro:
'Yes...!'
'And since that service was introduced, it seems my colleague's shipping preparation time has decreased significantly...'
'It seems the coffee time between the manager and my colleague has increased a little...'
Hana:
'Yeah.'
Jiro:
'Because of that, the manager...'
'He was stretching so much he almost hit the floor...'
Hana:
'What was?!'
Jiro:
'The area under the manager's nose...'
Hana:
'That's where it was (laughs).'
Jiro:
'For me, he's now Manager Under-the-Nose...'
Hana:
'You finally gave him a name (laughs).'
'And it seems like it's catching on with others around him, too.'
Seiji:
'There are some concerning parts, but as a decision, it's quite positive (laughs).'
'And what's interesting this time is that even though my colleague didn't explain it on the spot...'
'I think the perspective of "conveying it in a way that the other person can easily grasp" remained firmly with the manager.'
Jiro:
'...Ah.'
Hana:
'True.'
'The presence of the area under his nose is so strong I almost forget (laughs).'
'Maybe the way my colleague communicated it before, "conveying it in a way that can be visualized," stayed with the manager.'
Jiro:
'Yes...!'
'I was always just watching the manager's reaction...'
'What really moved the workplace was the "perspective of conveying it in a way that the other person can easily grasp" that my colleague left behind...!'
Seiji:
'Yeah, that way of looking at it is really good.'
'When people just look at the price as it is, their judgment tends to stop at "is it expensive or cheap?"'
'But when it becomes a form where they can think, "If I think about it in terms of my own life or work, it's about this much," it becomes easier to make a judgment.'
Jiro:
'I see...!'
'The area under his nose was a little close to the floor, but...'
'The judgment was quite positive and accurate...!'
Hana:
"You've started to be able to separate and see things properly there, haven't you? (laughs)"
[Theoretical Reinforcement] Dr. Narita's Reinforcement
Dr. Narita, who had been listening to the conversation so far, quietly opened his mouth.
Dr. Narita:
"Jiro, you reached a good point today."
"What's important is not just dividing the amount into smaller pieces."
"It's about making it a unit that the other person can visualize within their own life or work."
Hana:
"Indeed..."
"Rather than 'making it smaller,' it's about 'making it easier to imagine as something relevant to oneself,' isn't it?"
Dr. Narita:
"Indeed."
"What's important with the 'Pennies-a-Day' effect is not to end it at 'making it smaller makes the burden look lighter.'"
"When the human brain sees a large amount as it is, it tends to first feel that it is 'expensive' or 'heavy.'"
"However, when it becomes a unit close to daily sensations, such as 'per day,' 'per time,' or 'per cup,' it becomes easier to think, 'I can probably keep this up.'"
Jiro:
"That's why I hesitated a bit at '3,000 yen per month'..."
"But the moment it became '100 yen a day,' it suddenly became easier to imagine..."
Dr. Narita:
"That's right."
"People don't judge based only on the amount itself."
"They are also imagining how much of a burden that amount will be in their daily lives."
Seiji:
"That's why it's important to 'rephrase it into a unit that is easy for the other person to grasp,' right?"
Dr. Narita:
"Indeed."
"However, you must not hide the total amount or try to deceive them by making it look smaller here."
"The essence of this effect is not to dull the other person's judgment, but to 'make the burden easier to imagine correctly.'"
Hana:
"So it's not a 'technique to make it look smaller,' but a story about 'arranging it into a form that is easy to judge.'"
Dr. Narita:
"That's right."
"When you do that, people don't just stop at 'is it expensive or cheap,' but also find it easier to think about 'can I keep this up' or 'is this right for me.'"
"In sales, whether or not you can do this rephrasing changes how things are conveyed significantly."
Jiro:
"So that's what it is...!"
"It wasn't just a story about 'it's good to divide it' as I thought, but a story about 'making it into a form that the other person can properly imagine'...!"
[Summary] Today's Takeaway
Finally, let's all recap today's discussion one more time.
Hana:
"This is very neat when viewed in the flow from Season 1-1."
"We started with the initial standard, how numbers are seen, how they are arranged, and now it's 'what kind of unit to convey it in.'"
Seiji:
"Yeah, that's right."
"We looked at 'standards' in Season 1-1, 'numbers' in Season 1-2, and 'comparisons' in Season 1-3, right?"
"This time, as the next step, we are looking at how 'what kind of unit it is received in' changes the sense of burden."
Jiro:
"I see...!"
"Then today, rather than a story about 'how much it costs'..."
"It was a story about 'how to convey it so that the other person can easily imagine it'...!"
Seiji:
"Yeah, that understanding is really good."
Hana:
"Even with the same amount, the way it feels changes so much just by making it 'per day' or 'per time,' doesn't it?"
Jiro:
"Yes...!"
"I was starting to think that 'making it smaller' was the answer..."
"But the important thing is 'whether the other person can actually imagine it'...!"
Seiji:
"Yeah."
"That difference really changes how things are conveyed."
Hana:
"Jiro, you became someone who can talk in units that are easy for the other person to grasp today."
Jiro:
"Really...?"
"I'm glad...!"
"I was dangerously close to just getting better at breaking things down into smaller pieces...!"
Hana:
"That's not sales anymore, that's just being a craftsman of time (laughs)."
Jiro:
"That's true..."
"But today, I really understood that it's important to think about 'whether it's easy for the other person to imagine'...!"
Seiji:
"Yeah, just having that perspective changes things quite a bit."
Hana:
"And we also saw something else this time, didn't we?"
Jiro:
"Huh...?"
Hana:
"The department manager with the mustache left a strong impression (laughs),"
"but could it be that what really moved the situation was the 'way of conveying' used by your colleague?"
Jiro:
"............Yes."
"I was only looking at the mustache the whole time..."
"But what was truly amazing was my colleague's 'ability to shape things so they get across to the other person'...!"
Seiji:
"Yeah, that's probably a big part of it."
"Even with the same amount of money, people who understand 'how to convey it so the other person can think of it as their own issue' are the ones who can move things forward."
Jiro:
"I see...!"
"From now on, instead of saying 'It's a small amount!'..."
"I'll aim for 'It's in a form that this person can clearly visualize!'...!"
Hana:
"Yeah, that sounds like you'll be much better at your job (laughs)."
[A one-sentence summary for readers to take home]
Even if the total amount is the same, the perceived burden changes depending on 'what units it is received in'.
What's important in sales is not 'making it look small', but 'translating it into units that are easy for the other person to grasp'.
[*Limited Time: Click here for free Season 1 articles*]
☑️ Click here for the next episode
Season 1-5. 'The more expensive it is, the more it looks like "peace of mind"... The psychology where price influences quality'
{Price-Quality Heuristic}
A psychological tendency to use price as a clue for quality, making it easier to judge that higher prices mean better quality