At the end of the first chapter of the third part, Tanimura finds a bound Yasuka in the villains' den. https://youtu.be/YfKTMw0n_rs?t=5131
In fact, in the third chapter there is another scene with DID in the quest The Fate of the 30 Million Yen, but it is not clear there whether the angle doesnät allow you to see if there is a gag or not.
And I think it's final DID(CID) scene with great tape gag for Yakuza 4 It's a pity that with a stupid bad ending for Yasuko. https://youtu.be/5P4NnN2QcIU?t=4823