Seiji Mataichi

You can help expand this article with text translated from the corresponding article in Japanese. (February 2018) Click [show] for important translation instructions. View a machine-translated version of the Japanese article. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Japanese Wikipedia article at [[:ja:又市征治]]; see its history for attribution. You may also add the template {{Translated|ja|又市征治}} to the talk page. For more guidance, see Wikipedia:Translation.

Seiji Mataichi (又市 征治, Mataichi Seiji, 18 July 1944 – 18 September 2023) was a Japanese politician and previously was a member of the House of Councillors. He was also the Chairman of the Social Democratic Party. Mataichi died on 18 September 2023, at the age of 79.^[1]