Oh Adachi. Funny thing, I picked Adachi on dumb luck. Everybody kept talking about someone who wouldn't look suspicious so I chose Dojima. Then for the hell of it, I chose Adachi, and I was right. Who would've thought. All because of women, too.
This dungeon was easily one of the better. The design was alright, and even though it had bad music if you ask me, Adachi's quips and the overall layout deviating from the normal 1)find stairs, 2) go up method, even just a little, made it awesome. Then there's the dachi fight, while disappointing is still pretty fun, and leads into Ameno-Sagiri, which is a great fight.
Also, the one thing that cements Adachi as one of the best characters in the game happens in this dungeon. Look at him when he enters the battle. That walk is awesome.