Tensho Electric Industries Co., Ltd.History
TENSHO started by manufacturing electronic components, such as sockets and switches made from electrical insulating materials and thermosetting resins. We were the first manufacturer to commercialize a radio plastic cabinet. The history of plastic molding is in essence our history.
| 1936 | May | The founder, Goro Kikuchi, founded NoboruShoukai for the purpose of molding and processing synthetic resins and the manufacture and sale of insulating materials (Shinagawa-ku, Tokyo, Japan). |
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| 1940 | September | Noborushokai incorporated and the company name was changed to TENSHO Electric Industries Co., Ltd. |
| 1943 | May | The Osaka plant started operations (Joto-ku, Osaka City, Osaka Prefecture). |
| 1944 | February | The Nihonmatsu plant started operations (Nihonmatsu City, Fukushima Prefecture). |
| 1961 | October | TENSHO Electric Industries was listed on the Second Section of the Tokyo Stock Exchange. |
| 1963 | May | The Sagamihara plant started operations (Sagamihara City, Kanagawa Prefecture). |
| 1970 | March | The Fukushima plant started operations (Adachi-machi, Adachi-gun, Fukushima Prefecture). |
| 1973 | February | The electronic equipment division was separated from TENSHO Electric Industries and TENSHO Electronics Co., Ltd. was established. |
| 1976 | June | The Fukushima Mold plant started operations (Adachi-machi, Adachi-gun, Fukushima Prefecture). |
| July | The Nihonmatsu plant (molding division) relocated to the Fukushima plant. | |
| 1977 | November | The Sagamihara plant was enlarged and the production facilities of thre Tokyo plant were relocated to the Sagamihara plant. |
| 1981 | May | Tokyo Mold plant relocated to the Sagamihara plant. |
| 1987 | April | The New Business plant (NB plant) started on the premises of the Fukushima plant. |
| 1989 | June | TENSHO concluded a technical tie-up with Thai Summit Autoparts Industry Co. Ltd. (Thailand) and started the overseas technical support. |
| November | TENSHO concluded a capital tie-up with Asahi Kasei Corporation. | |
| 1991 | November | The Yabuki plant started operations (Yabuki-cho, Nishishirakawa-gun, Fukushima Prefecture). |
| 1993 | March | TENSHO had a technical tie-up with Summit Plasto (Indonesia). |
| 1998 | October | TENSHO had a capital tie-up with Sanko Co., Ltd. |
| 2001 | October | TENSHO made an equity investment in Sannou Giken Kogyo Co., Ltd. |
| 2002 | April | TENSHO merged with Sannou Giken, relocated the Sagamihara plant to Saitama Prefecture, and integrated the plant into the Saitama plant. The the Saitama plant started operations (Kawajimamachi, Hiki-gun, Saitama Prefecture). |
| 2003 | December | Tensho Plastic (Changzhou) Co., Ltd. was founded (Changzhou City, Jiangsu Provence, China). |
| 2004 | November | The name of Igaueno plant was changed to Mie plant. |
| 2005 | October | TENSHO made an equity investment in Daiichi Kaken Co., Ltd. |
| December | TENSHO made an equity investment in Shanghai Sharp Mold and Manufacturing Systems Co., Ltd. | |
| 2006 | April | TENSHO merged with Daiichi Kaken Co., Ltd. and the the Gunma plant started operations (Ota City, Gunma Prefecture). |
| December | Boryszew Tensho Poland SP. Z o.o. was founded (Torun City, Poland). | |
| 2007 | January | Tensho America Corporation was founded (San Diego City, CA, USA). |
| April | Tensho Mexico Corporation S.A. de C.V. was founded (Rosarito City, Baja California, Mexico). | |
| August | Tensho Plastic (Changzhou) Co., Ltd. relocated to Liyang City, Jiangsu Provence, China. | |
| 2008 | June | The headquarters relocated from Wakabayashi, Setagaya-ku, Tokyo to Machida City, Tokyo. |
| 2013 | January | Tensho (Changzhou) Trading Co., Ltd. was established. |
| 2018 | June | Tensho America Corporation becomes a consolidated subsidiary. |
| 2021 | July | TENSHO made an equity investment in Ryumai Plastics Co., Ltd. |
| 2023 | August | The headquarters relocated from Machida City, Tokyo to Komazawa, Setagaya-ku, Tokyo. |