Tekijuku was a private school of Dutch studies in Osaka, Japan. Ogata Kōan, a doctor and scholar of Rangaku, established it in 1838 during the Tenpō era of the late Edo period. Its official name was Tekitekisaijuku, named after one of Ogata's art names, Tekitekisai. It was located in Osaka's traditional merchant neighborhood of Semba on the main trading route between Nagasaki and Edo.
The foreign language curriculum focused primarily on medicine, but also taught astronomy and other western sciences.
Wikipedia https://en.wikipedia.org/wiki/Tekijuku
Official Osaka Tourist Guide http://www.osaka-info.jp/en/search/detail/sightseeing_1990.html
Address Osaka, Japan
Coordinates 34°41'28.684" N 135°30'11.689" E