 Accordingly, Udagawa also made numerous scientific experiments and created new scientific terms, which are still in current use in modern scientific Japanese, like , , , and .The Rangaku scholar Takeda Ayasaburō built the fortresses of Goryokaku and Benten Daiba between 1854 and 1866, using Dutch books on military architecture describing the fortification of the French architect Vauban.Education in the French language started in 1808 in Nagasaki, when the Dutch Hendrik Doeff started to teach French to Japanese interpreters.