Tosho Seiko factory — precision cutting with cooling oil

A small factory, all in.

Cutting metal in a Tokyo back street since 1973.

  1. 01

    We cut metal

  2. 02

    We build the means to make

  3. 03

    It started with measuring

  4. 04

    Skill, turned to beauty

Inside the factory

Tosho Seiko factory — drilling an aluminum block by hand
It starts as a block of metal
Tosho Seiko factory — milling with cooling oil
Cut, then polished to a mirror
Tosho Seiko factory — machinist at a Makino milling machine
One maker, one piece at a time
Tosho Seiko factory — surface grinding with digital readout
Ground, then measured
Tosho Seiko factory — tool holders arranged on a rack

From the skill we have built

Brass mahjong tiles, engraved — Tosho Seiko
Metal mahjong tiles
Snowflake candle holders, machined aluminum — Tosho Seiko
Snowflake candle holders
Tosho Seiko factory — Mazak Quick Turn Smart 250M lathe
Machines, shoulder to shoulder

Made on the everyday machines

Fifty years

  1. 1973 Began manufacturing special gauges in Sumida, Tokyo.
  2. 1986 Took the name Tosho Seiko Co., Ltd. While raising the level of our precision machining and building up our equipment, we widened the range of what we make.
  3. 2011 Selected for the New Product and New Technology Development Grant Program of the Tokyo Metropolitan Small and Medium Enterprise Support Center, and pressed on with new technical development.
  4. 2017 Exhibited at trade fairs held in Thailand and Indonesia, sending Tosho Seiko's technology out into the world.
  5. Now Drawing on the precision machining built since our founding, together with our special gauge production, machined components and the experience gathered along the way, we are taking on new kinds of making. One of them is tamatebaco, an accessory case cut from solid aluminum. The high accuracy and the fine finish that only a small factory making industrial parts can reach, brought to an object for everyday life. It carries the skill we have built into making that more people can feel close at hand.