Former National Tax Expert Secretly Teaches You About the Billionaire Next Door (Yoshitaka Kobayashi) – Diamond Publishing – Diamond Inc.

【Even with billion yen in assets, they still drive a scratched-up minicar.】
What the “top 3.5% of the wealthy” are doing secretly

The book that understands inheritance real estate (Shinya Uesaki et al.) – Gentosha

Illustrated Guide to Saving Money! All the tricks to save taxes (Yoshitaka Kobayashi) – Kizuna Publishing Co.