Подскажите пожалуйста в Шанхае анимэ-магазины (не знаю как правильно это называется), где можно купить популярные выпуски манги и мерч по дунхуа/анимэ.

Нашел на реддите - 浙江中路 place exists (see other comments), no AC but a lot of ultraman, DBZ, one piece, demon slayer, and gundam merch along with trading card cafes, overall not bad but not too many high quality figures or merch to be found - new place on 南京东路 is fantastic (take metro 2 to 南京东路 station, exit 1, turn left, front should have three stores: 三月兽, Megahouse, Tamashi Nations store, along with a jumbotron so you can't miss it), several stories of all kinds of figures and anime merch (for cheap, no less) and they have claw machine games near the top floor. Definitely worth checking out if you're into anime. Has AC, also super clean.

Ещё местная акихабара есть Wenmiao Road Toys Street 中國上海市黄浦区老西门文庙路. Но там скорее рынок.