A Login Bonus for Electricity? Introducing the "Welcome Sunny Discount" That Makes You Look Forward to Sunny Days!

Looop Denki's "Sunny Discount" has been well-received for its somewhat unique mechanism where "electricity bills become cheaper on sunny days."

And now, I've heard rumors that a "Welcome Sunny Discount" has launched, specifically for those who have newly joined Looop Denki.

“How is this different from the previous Sunny Discount…?”
“Is there some new, interesting twist that’s different from usual…?”

So, to uncover the truth, I, Kubo from the PR department, interviewed the two people in charge of planning the "Sunny Discount"!

💡 For first-time readers: If you're wondering, "What even is the Sunny Discount?", please be sure to check out our previous Sunny Discount interview too👇️

The Sunny Girl and Sunny Boy are back! The quirky people in charge of the "Welcome Sunny Discount"

Nakayama: Hello! I’m continuing my role as the "Sunny Girl," Nakayama, in charge of the "Sunny Discount"!
Oyama: Nice to meet you! I’ve been appointed as the second-generation "Sunny Boy," Oyama! Looking forward to working with you!

Kubo: Oh, nice to meet you (the pressure is intense again this time...). Wait, this is your first time appearing, right, Oyama-san? Did you take over from the previous Sunny Boy, Tanaka-san?

Oyama: That’s right! I’ve inherited my predecessor’s passionate spirit and the title of "Sunny Boy," and this time, I’m going to make the "Welcome Sunny Discount" a big success!

Happy when it’s sunny! What is the weather-linked "Sunny Discount"?

Kubo: To begin with, what is the "Sunny Discount"?? I heard that it gets cheaper on sunny days, but is that true? I just joined the company, so I don't quite get it...

Nakayama: Well then, before explaining what the Sunny Discount is, let’s talk about "why it’s cheaper when it’s sunny"!

Simply put, during the day on sunny days, a massive amount of electricity is generated by solar power, so the amount produced (supply) becomes greater than the amount used (demand). Therefore, electricity tends to be cheaper during the day on sunny days.

Kubo: I see, so is it like we can use as much electricity as we want during the day on sunny days?

Oyama: I wish I could say that, but there is actually a major challenge there... In fact, electricity cannot be stored in large quantities, and there is a rule called "simultaneous supply and demand," which means the "amount produced" and the "amount used" must always be kept exactly the same. If this balance is lost, in the worst-case scenario, there is a risk of a city-wide blackout. That’s why, unfortunately, the surplus electricity that isn't used has to be thrown away.

Oyama & Nakayama: Oh, what a waste!!

Kubo: Wow! Even though we generated so much power thanks to the sun's blessings, that is such a waste!!

Nakayama: Yes, it really is a waste. That’s why the "Sunny Discount" was born. It’s an initiative created from the desire to "have everyone use the surplus electricity so that the power generation isn't wasted!"

It is Japan's first (*) campaign that is friendly to both your wallet and the Earth, offering a discount on electricity used between 10:00 AM and 2:00 PM, when solar power generation is at its peak.

Oyama:If you're going to use it anyway, we want you to use a lot of it during the time when electricity would otherwise go to waste. That’s exactly why we want you to shift chores like laundry and cleaning, which you might usually do at night, to the daytime instead.
We hope the "Sunny Discount" can be a catalyst for customers to build "habits of using electricity in a way that is effortless, fun, and economical!"

* As of July 2025, "Campaign where electricity bills become cheaper on sunny days," based on our company's research.

What has been the response to the "Sunny Discount" so far?

Kubo: You've held the first and second rounds of the "Sunny Discount" so far, but what was the actual reaction from customers?

Nakayama: It was a response beyond our imagination! So many people participated. In the first round, held exclusively for customers in the Tokyo area in July 2025, about 15,000 people participated. Then, in the second round held in December of that year, we expanded the target nationwide (excluding Okinawa) and about 25,000 customers participated.

Oyama: In the survey of those who participated in the Sunny Discount, 97% answered that they "want to participate again (continue)." Also, 93% answered that they were "glad they chose Looop Denki" after the campaign, which was a result that made us feel a great sense of accomplishment.

Kubo: A satisfaction rate of over 90% is amazing! It's because everyone liked it so much that it led to this third round, the "Welcome Sunny Discount."

What is the "Welcome" element? Differences from the previous Sunny Discount

Kubo: By the way, how is this "Welcome Sunny Discount" different from the previous "Sunny Discount"?

Oyama: The biggest difference is that it is "limited to customers who use the app for the first time!" Furthermore, we incorporated the fun of a game, where you collect tickets like a "login bonus" to participate.

Kubo: A login bonus? That sounds like a smartphone game, which is exciting!

Oyama: That's right. When you log in to the app for the first time, you get one "Sunny Discount Ticket."

If you open the app the week after your first login, you get a second ticket, and if you open it the following week, you get a third, for a system where you can get up to three tickets (for three weeks). With one of these tickets, you can participate in "Sunny Discount Week" once.

Kubo: I see, what exactly is that "Sunny Discount Week" period?

Nakayama: The entire third week of every month (Sunday to Saturday) is "Sunny Discount Week." On days when the weather forecast on the preceding Saturday predicts "anything but rain" during Sunny Discount Week, we will hold the Sunny Discount every day. On Sunny Discount days, electricity usage from 10:00 to 13:59 will be discounted by 2 yen/kWh.

Kubo: Wasn't the backend system development difficult to implement?

Oyama: It was! We struggled quite a bit to create a system that would allow customers to use it "easily and enjoyably."

For the Welcome Sunny Discount, as long as you get the ticket on the app, all discounts during Sunny Discount Week are applied automatically. There is no need for troublesome advance entry or any operation like pressing a button on the day.

Kubo: Not having to do anything on the day is extremely easy!

Oyama: That's right. It's a system that automatically determines the weather in the customer's area on the backend and automatically processes the discount as is.

Kubo: I see, because it's automated to that extent on the backend, customers can experience it without feeling any stress at all.

Oyama: Exactly! All you have to do is check the app to see if it's a "Sunny Discount Day" and try shifting chores you usually do at night to the daytime. I hope you can use electricity in a way that is fun, easy, and cost-effective.

A new way of engaging with electricity, as envisioned by the "Welcome Sunny Discount"

Kubo: What do you want new customers to feel through this "Welcome Sunny Discount"?

Nakayama: In a word, it's the experience of being "kind to both your wallet and the planet."

It's perfectly fine to start just because there's a great campaign. I hope people will first open the app like a game and start collecting tickets.

As you open the app every week, you might find yourself checking the electricity forecast or noticing changes in the graphs, and then experiencing actual savings during Sunny Discount Week. It would be wonderful if the action of "changing when I use electricity because it's cheaper" leads to the joy of realizing, "I've actually been doing something kind for the planet!"

Oyama: That's right. We want new customers to experience something unique to Looop that they can't get from other power companies.

As you check the weather and experience how "it gets cheaper when it's sunny," you'll likely start to notice how much electricity is being wasted and naturally become more environmentally conscious.

I hope you enjoy the experience of starting with savings for your wallet and finding yourself accustomed to eco-friendly habits before you know it!

Delivering the excitement that makes you look forward to sunny days even more

Kubo: Finally, do you have a message for our readers?

Nakayama: For those who are about to join Looop Denki or have just signed up, please download the app and get your first ticket.

I would be happy if you could take a look at the app, especially if you are new to Looop Denki, so that you can make the most of the service.

Oyama: With the "Welcome Sunny Discount," which is packed with our dedication, you will be able to experience a new way of engaging with electricity. I hope many people will enjoy the excitement that makes sunny days something to look forward to. We look forward to your participation!

▼ Click here to download the app
・iOS

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Recap of the "Welcome Sunny Discount" points

Did their passion come through? Let's wrap up with a recap of the key points!

A new experience that makes "electricity," which is usually hard to be conscious of, feel more familiar and fun. We hope many people will engage with this new initiative from Looop!