Oguri Shunnosuke (小栗 旬之助) is the cameo of real-life popular Japanese haiyuu Oguri Shun (小栗 旬). He was invited to Yagyuu Kyuubei's birthday party in Episode 154. Said by Toujou Ayumu to be a true friend of Kyuubei, connected to each other like the spirit is bonded to the body.
- In the closing scene of Episode 154, where everyone was shown enjoying the cake picnic-style, in the original Weekly Shounen Jump publication Oguri Shunnosuke was not present. He was subsequently added in the aforementioned scene in the tankoubon release, which the anime episode followed.
- The real-life Oguri will portray Sakata Gintoki in Gintama's 2017 live-action film.