Shin returning the chairman his wallet
The executive chairman of Futaba Shoji appears in the episode 221c, the episode is about the time when Hiroshi nearly risked his job by forgetting the very important documents of the meeting he had that day. He phones Misae and tells her what he has done, Misae rushes with the papers to his office with her two children. Shinnosuke, being the trouble maker he is, gets lost in the train to Futaba Shoji. More importantly, he has the papers with him. When he and his sister get off the train, he notices that a man has dropped his wallet, he returns it back to him. A few moments later it is found that the man was the executive chairman when he showed up to the meeting (the man saw his company's name on the file containing the meeting's papers).