How I Went from an Annual Income in the 4 Million Yen Range to Saving 20 Million Yen, and Why My Assets Have Now Reached 70 Million Yen

It is a bit late for this, but here is my self-introduction.

I have written several articles so far, but I have not introduced myself. Better late than never, so let me tell you a little about myself.
I am a company employee in my 40s living in a regional city with my wife and three children.

I am a serious and stubborn person by nature. Perhaps because of that, I am the one in charge of managing the household finances, not my wife.
After working for a long time in accounting at a small-to-medium-sized manufacturing company I joined as a new graduate, I made a firm resolution and recently changed jobs.

However, there are days when I feel that the job change might not have gone well so far.
Even so, I continue to steadily manage my household finances and build my assets.

I have been frugal since I was young, but I did not start investing until I was around 30.
I got married in my early 30s, and by that time, I had already accumulated 20 million yen in assets.
At that time, my annual income was only about 4 million yen, so it felt like steady, incremental investing.

However, after I became a manager in my late 30s, my annual income increased significantly, and my investment amounts increased proportionally.
Since I am naturally frugal, my standard of living did not change much, and coupled with the fact that my asset management happened to go well, my total assets have grown to just under 70 million yen now that I am in my early 40s.
However, since I still have about 30 million yen remaining on my home mortgage, my net financial assets are about 40 million yen.

In this note, I will mainly write about themes such as:

・The path to building assets starting from an annual income in the 4 million yen range
・How to structure household finances and frugal habits
・How I started investing and how I continue to do it
・The reasons I decided to buy a home and the points I regret
・The background of my job change and what I learned from my failures
・How I work as a company employee and my search for side jobs

I also occasionally write reviews of movies and books as a hobby, so if you are interested, please read those articles as well (lol).

By the way, I have a goal to stop working for a company before I turn 50.
Since you only live once, I want to have various experiences. As one part of that, I want to graduate (?) from company employment by age 50 and live a free life without being tied down by money.
That said, I do not have any special skills or qualifications yet, but I am thinking about creating income from side jobs and eventually trying my hand at Kindle publishing.

Frugality, investing, side jobs, and entrepreneurship are all still in progress.
I want this note to be a place where I realistically record that process.