Fujimori Corporation, the owner of MITUBACI, is a jewelry manufacturer established in 1970 and located in Sangenjaya, Tokyo. We are a small company, but we are a team of designers, craftsmen, workshop assistants, and advisors who help our customers to choose jewelry....
MITUBACIは12周年をむかえました
Thanks to your support, on January 11, 2023, MITUBACI celebrates its 12th anniversary. We hope you will continue to support us as we continue to increase our power! We are also preparing campaigns and events to celebrate our 12th anniversary, so please look forward to them...
あけましておめでとうございます
Happy New Year! MITUBACI is open for business from January 4, 2023. We look forward to working with you in this new year. We are planning new workshop items and events for 2023. Please check our website, Instagram, and other social networking sites from time to time...
虹色に輝く結晶・ビスマス鉱石を作ってみました
Bismuth ore with attractive geometric patterns Hello, I am Yanagizumi, a craftsman. I like gems and ores, and often visit jewelry stores and mineral shows to collect stones that I like. This time, I tried to make "bismuth ore," which is said to be an ore that you can make by yourself, in my workshop! Crystals from actual bismuth ore...
11月の誕生石・シトリンのお話
The birthstone for November is citrine I would like to talk about citrine. Citrine is the birthstone for November, the same as topaz. Its Mohs hardness is 7, and it is relatively easy to pick up even for those who do not usually touch jewelry because of its good coloring and durability...
【子ども向け】宝石＆ジュエリーのワークショップ
Hello, my name is Sakuta, a MITUBACI staff member. One of the workshops that I would like to do someday at MITUBACI is called "Jewelry Experience for Children. Today, I would like to introduce part of that concept. MITUBACI will have been in business for 10 years in January 2021...
硬貨に使われている金属について・金属のお話 その2
Hello, my name is Shindo, a craftsman. Since I talked about precious metals in the last issue, I would like to talk about the most familiar metal in our daily lives, coins. ＜It is a well-known fact that a one yen coin weighs 1g, but other coins weigh different amounts and are made of different materials....
火を使う作業台とロウ付けに使う工具のお話
Hello, this is Fujimori, a craftsman from MITUBACI. This time, we would like to introduce our workbench and tools used for brazing, annealing, and other fire-working processes. Brazing is the process of filling the gaps between metals (gold, silver, etc.) to be joined with a metal (gold solder) that is mixed to melt at a temperature lower than the melting point of the metals to be joined.
指輪の素材（貴金属）について
This is Shindo from MITUBACI. This time I would like to study the materials (precious metals) used in MITUBACI. I think you have studied it in junior high school or high school chemistry, but I will try to explain it as simply as I can as a craftsman. I would like to talk about precious metals, but first, what is a metal...