The Trash Bag is the single most powerful item in the game. you unlock it after the Sewer chapter. As the most powerful item you are limited to a single one of them at a time.

So where do we get the Trash Bag, to refill our inventory?

There's a few locations, and we'll list them down as we find them. sound good to you?

It's found in the same place you found it originally. At the end of the first section of the stage, right before the stairs up, you'll find it in the room with the dead crow.

the easiest way to get back here is in the post-game, after completing the wooden-plank/Catfish Whisker section of the sewer you will find yourself at an outside area with a Jizo statue. you can warp to and from the statue whenever you want, and from the fenced in area entrance to the sewer it is a straight shot to the Trash Bag room.

At the South-East end of town is a rice field with a Shrine located in the middle of it. To the direct west of the Shrine is a small graveyard. This is the location of the second Trash Bag. This is also the location of the Candle Collectible. Beware of Bomb Spirits.

if you don't want to make a trip through the sewers, or you're passing the shrine to unload a bunch of coins for other supplies, be sure to stop by here to pick up a trash bag.

The quickest way to the trashbag is directly South-West from the Jiro statue.

???????

i'm still exploring the town but i'll let you know if i find anymore.