Tsukiji can be an impressive place to visit, especially with someone who knows the area and what is in season. The outer market is a treasure trove of different foods and cooking items. I would especially look at Masamoto knives!. In terms of sushi at the market, you can certainly standin line for hours or you can go a stall or two over and get very good sushi or donburi bowls with minimal or no wait and cheaper. Just be open to look around a bit and walk in somewhere and say konnichiwa!

I won't list anything here but I can make a recommendation for a guide if you would message me.