From 5 Million Yen in Debt to 300 Million Yen in Annual Revenue: The Secret Behind a Revolutionary Sales Method Unveiled

Tukushi will publish a Kindle e-book on June 10, 2026. Having reached 300 million yen in annual sales from the depths of quitting her job due to ADHD and 5 million yen in debt, she has also received the Cultural Broadcasting 'Business & Innovation Award,' appeared on a radio program hosted by former Fuji TV announcer Mr. Kasai, and been featured multiple times by NTT-provided media. She shares her experience that 'just changing where you fight can change your life' in her first-ever book.

■ 'Why can't I earn money even though I'm trying so hard?'—The answer is in this book.

Working hard in Japan doesn't lead to higher salaries. Even trying side hustles is difficult due to fierce competition. Many people feel this sense of stagnation and are searching for a change.

Author Tukushi was once one of them. After being effectively fired due to ADHD and failing in a side venture, leaving her with 5 million yen in debt, she faced collection letters in aシェアハウス (share house) with 30,000 yen rent. Her life changed when she stumbled upon 'a single question.'

Since then, her life has changed dramatically. Among the 400 students she has mentored, some achieved their first earnings within just one month and reached a monthly income of 300,000 yen within six months.

The content of that 'question' and method is inside this book.

■ What this book conveys

This is not just another how-to book. It proves through the author's own true story that by changing 'where you fight,' you can earn money regardless of your age, background, English skills, inventory, or capital.

As proof, she offers not only her own story but also the surprising true tale of her tech-challenged mother in her 60s, who went from relying on others for simple tasks to earning 300,000 yen a month just by pressing a button.

■ Who should read this

'I am worried about whether my pension is enough, but I don't know what to do.'

We want to deliver this book first to housewives and seniors in their 50s and 60s who feel this way. Of course, it is also for those who:

- Want to earn money from home without physical labor.
- Have never tried a side hustle or part-time job.
- Feel they have reached their limits with platforms like Mercari or domestic reselling.
- Have given up on side hustles, thinking, 'It's not for me.'

If any of these apply, you should read this.

Comment from author 'Tukushi':

'Back when I was in debt and producing no results, I was fighting in the wrong place. Once I moved to the right place, everything changed dramatically. I have written exactly where that place is and how to get there in this book.'