The Japanese Pachinko (pinball) market is bigger than the casinos of Las Vegas, Singapore and Macau combined and is dominated by ethnic Koreans like Masayoshi Son of Softbank whose dad was in the pachinko parlor business. This might explain the "gambling" tendencies of Masayoshi Son and Softbank with investments in WeWork and Better.com

https://en.wikipedia.org/wiki/Pachinko

https://asia.nikkei.com/Business/CEO-in-the-news/SoftBank-Ma...