person worth at least 100 million yen; millionaire (in yen)
Slang term from the investment community, especially cryptocurrency and stock trading. A pun on 送り人 (おくりびと, pallbearer), implying one who has 'sent off' a fortune. Often used in online forums.
See also: 億
I heard he became a millionaire (in yen) through cryptocurrency.
To become a person worth 100 million yen, risk management is crucial.