Occasionally having Japanese cooking at home, not a fine Japanese cuisine, but you can make some economical Japanese dining at home with the following ingredients:
1) Japanese Kosakana Furikake (Rice Seasoning)
You can use some rice seasoning, mixing with the normal steamed rice to increase more rice aroma and taste. There are many favors and seasoning recipes in the market at your choice, such as sesame, dried salmon, dried fish or seafood etc. Just be aware of sodium intake. It recommends to consume once or twice a week.
2) Miso Soup Paste and Wakame
There are many miso soup in the market such as less salted, or regular tasted miso soup. However, I recommend the white miso soup that is less salted, and it is perfectly matched with the instant wakame ingredients. Yummy and very low cost ! You can serve it for regular soup or a soup base for cooking with noodles.