Housework wholesaler ｜ Tetsumaro

We are Tetsumaro, a household goods wholesaler that manufactures household items in Tsubame City, Niigata Prefecture, a city famous for metal processing. Tetsumaro, made by Kajitonya, is characterized by its size and shape that make it convenient for everyday use. This is a manufacturing process that can only be achieved by a local wholesaler with in-depth knowledge of the materials, the site, and the techniques.
Click here for a list of Kajidonya's products
[Similar product] Click here for Toribe Seisakusho's Iron Healthy Sea Bream

Make food fresh

By adding Tetsumaro to your rice bran bed, you can pickle eggplants in a vibrant color without losing its color. Also, adding it to a pot of boiled black beans gives them a glossy finish. This is due to the effect of the iron ions, and it is a useful item for daily cooking and iron supplementation.

For daily iron supplementation

Simply boil water in a kettle with Tetsumaro and remove it after about 10 minutes to make delicious boiled water. You can use it as is in miso soup, hot pot, or cooked rice without affecting the taste or appearance, and increase your daily iron intake. Women who need iron in particular during their growth period and during pregnancy and lactation can supplement the iron they cannot get from food by using Tetsumaro.

Easy to use

The shape of Tetsumaro is not a flat donut shape, but is shaped so that it is easy to take out with chopsticks when removing it from a pot, etc. It is also easy to attach string to it, so it is recommended as a safer and easier alternative to iron nails.

Caring for Cast Iron

After use, the Tetsumaro must be washed and thoroughly dried to prevent rust. If rust does appear, it can be used again after removing the rust with a scrubbing brush or cloth and thoroughly drying it.
[Housework wholesaler] A brand that makes household tools that fit into everyday life in Tsubame City, Niigata Prefecture, famous for metal processing. "Kajidonya" continues to make "ordinary, yet easy-to-use" household tools by listening to the feelings of the user, selecting materials, and utilizing technology.
Click here for a list of Kajidonya's products


"Tetsumaro" is a household goods wholesaler that makes household items in Tsubame City, Niigata Prefecture. If you put it in your rice bran bed, it will help keep the color of eggplants bright and not fade. If you put it in a pot of boiled black beans, it will give them a glossy finish. If you put it in the kettle when boiling water, it will also replenish your iron. Its shape makes it easy to take out with chopsticks and easy to attach a string to.

[Product Information]
[Product name] Tetsumaro
[Size (approx.)] W45 x H17mm
Weight (approx.): 100g
[Material] Cast iron
[Country of Origin] Japan

● Precautions for use
Dishwasher ×, Microwave ×
- Wash thoroughly with water before use.
- After boiling the water, it will be very hot, so please be careful not to get burned.
- If you tie the string, it will be easier to take out even after boiling water.
・This product is made of cast iron and will rust. Dirt and moisture can cause rust, so after use, remove the product, wash it thoroughly, and wipe it dry with a dry cloth.