Dake (だけ), a.k.a. Dake-san (だけさん) or Mr. Dake - Dake-san is hired by Shu to get Yuki Mitani to stop cheating. Dake poses as a regular at Shu's Go salon and hides his own strength to snare Yuki. Dake-san bets money on the game, reveals his strength, and defeats Yuki. He forces Yuki to give him 10,000 yen (about 90 United States dollars). Hikaru Shindo and Fujiwara-no-Sai are angered by Dake-san's actions and defeat him (see Dake-san Game). The pair win 10,000 yen and give it to Yuki. Dake-san likes to sing romantic songs while playing Go.