Noritama のりたま (ふりかけ)
How to eat rice:
In Japan, we sometimes eat without a main dish.
We often add some food that matches well with rice.

If the rice is cheap and tastes so-so, the topping changes the rice into a delicious meal.
These types of toppings are called “Gohan-no-otomo ご飯のおとも” in Japanese.

My recommendations of the Gohan-no-otomo are listed below.
(I chose cheap ones and they are good as souvenirs)
Noritama のりたま (ふりかけ)
Noritama のりたま
This (58g pack) is about 200 yen at many supermarkets in Japan.
Manufacture: Marumiya 丸美屋
Noritama のりたま (ふりかけ)
Noritama のりたま is a product name of Furikake ふりかけ.
Furikake is a type of “Gohan-no-otomo ご飯のおとも” and usually dried and looks like powder.

Nametake なめ茸 (Nameko mushroom)
Nametake なめ茸
This is seasoned Enokitake えのきたけ mushroom.
Bottles that contain 120g cost about 100 yen at many supermarkets in Japan.
Nametake なめ茸 (Nameko mushroom)
Many Manufactures sell Nametake なめ茸, and the products usually have the same universal taste. However, their product designs vary. If you are looking for Nametake, please find the products with なめ茸 or なめたけ printed on the bottle.

Karashi-mentaiko 辛子めんたいこ
Karashi-mentaiko 辛子明太子 からしめんたいこ
Spicy seasoned cod (pollack) roe
Karashi-mentaiko 辛子めんたいこ
Karashi-mentaiko 辛子めんたいこ

Umeboshi 梅干
Umeboshi 梅干 うめぼし are pickled Japanese plums.
Traditional type of umeboshi tastes very salty and sour.
Umeboshi 梅干
We often put umeboshi on rice or in rice balls.
If you are new to eating umeboshi, having honey seasoned umeboshi would be good for you. However, honey umeboshi and rice don’t combine well.
Umeboshi 梅干
There are a variety of umeboshi in many supermarkets in Japan.

Other products
http://japancourse.com/world/2016/01/05/natto/