【Over 590,000 Copies Sold! Buzzing with Word-of-Mouth!】 ★Winner of the 2024 "Readers' Choice Business Book Grand Prix" Long Seller Award★ ★Top 10 "Annual Bestsellers" of 2024 (Business Books/According to surveys by Nippan and Tohan)★ ★Featured on "Kazlaser to Manabu (NTV)"★ Focusing on "how to spend" money, not "how to save" it, This is an unprecedented "textbook on money." Economists, entrepreneurs, and the New York Times all rave about it! This book will completely transform your outlook on life. What is "the way of using money that makes your life too rich?"