"How to Aim for a 30 Million Yen Annual Income at a Professional Services Firm" Takashi Harada Price: 1,500 yen (1,750 yen including tax) As a professional myself, I found some parts of this book very helpful and others not so much. If you'd like, I can add sticky notes indicating the parts I found helpful and the parts I thought were not, along with my reasons. If you're interested, please let me know in the comments section. Although I am a professional in a different field than the author, I believe earning over 30 million yen annually in a professional services field is quite risky and requires a willingness to leave the industry within a few years."