http://www.financialexpress.com/industry/how-softbanks-masay...
[H]e is the richest man in Japan, despite having the distinction of losing the most money in history (approximately $70bn during the dot com crash of 2000).
https://www.bloomberg.com/billionaires/profiles/tadashi-yana...
After that is Takemitsu Takizaki, of Keyence:
https://www.bloomberg.com/billionaires/profiles/takemitsu-ta...
[H]e is the richest man in Japan, despite having the distinction of losing the most money in history (approximately $70bn during the dot com crash of 2000).