Todays mmm-yoso!!! post is being written by Cathy. Kirk is enjoying air conditioned comfort and is too busy to write.
As I was reading Kirk's post about Kumo Japanese Sandos, in early May, I realized that The Mister and I have also been grabbing Japanese supermarket sandwiches for decades but never posting on this ever present inexpensive quick and tasty meal. So, here's a small compendium.
Nijiya Japanese Market is a favorite stop because of the organic Produce section as well as the prepared foods area. I wrote about some 'grab and go' meals in 2010 and 2013. We were here a lot during Covid (yes, "Covid" defines a period of time), when they removed the outdoor tables so we had to eat in the car or at home. A few prepared items, along the back wall, have changed but overall the quality remains. 
There is a two sided refrigerated area near where you stand in line for the cash registers. One section has various sandwich choices.
This is a "Mix Sandwich" ($5.49) on white or wheat. Four different fillings- Tuna Salad, Egg Salad, Ham with butter and a Lettuce and Tomato with cheese and mayonnaise. Each piece of sandwich in this mix is 1/3 of a crustless bread sandwich made with three bread slices and two layers of filling.
The "Fruits Sandwich" varies daily. This one had melon and pear and orange along with whipped cream in between slices of a quality white bread.
Picked up some sushi while I was there and we had a nice meal.
There is a Chicken Cutlet sandwich ($5.99)-breaded deep fried chicken with a house made tonkatsu sauce (A Pork Cutlet sando is $6.99). On this day the Fruits Sandwich was simply strawberries with whipped cream. 
Placed between the three Chicken sando sections were three smaller lettuce/tomato/cucumber/mayonnaise sandwiches. A nice, balanced meal.
Nijiya Market 3860 Convoy Street San Diego 92111 Open daily 9-9 Website (858) 268-3821
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Marukai has two 'grab and go' island refrigerators as well as closed door freezers and a small hot deli counter. There is just so much inside this small yet packed market. 
The egg salad sando ($4.99) as well as the katsu pork sando ($4.99) are exceptionally good here. You can see I also purchased the potato salad and some katsu chicken (which is really tasty from here). {Yes, we use Christmas plates all year.}
Marukai 8151 Balboa Ave San Diego 92111 Open daily 8a.m.-9 p.m. (858) 384-0248 Website
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Located between Marukai and Nijiya is Mitsuwa, which has three small restaurants in the 'Food Court" area as you enter the store and a sushi area as well as plenty more 'Grab and Go' choices along the right wall with two open refrigerated sections across the aisle.
The Mix Sandwich here ($7.99) consists of four sandwiches, each 1/3 of a whole sandwich. Egg Salad, Tuna Salad, Ham with lettuce and a Japanese Potato salad sando. Each sandwich is fresh and flavorful and fancy. Again, katsu chicken was purchased as a 'side'. 
Mitsuwa Marketplace 4240 Kearney Mesa Road San Diego 92111 Mitsuwa website (858) 569-6699
We have so many great choices in San Diego.
