▁at ▁the ▁Nag as aki ▁Naval ▁Training ▁Center , ▁and ▁ ▁established ▁a ▁medical ▁school ▁and ▁hospital . ▁Some ▁of ▁his ▁noted ▁students ▁included ▁Nag ay o ▁S ens ai ▁and ▁M ats um oto ▁Jun . ▁ ▁Biography ▁Pom pe ▁van ▁Me er der vo ort ▁was ▁born ▁into ▁an ▁arist ocr atic ▁family ▁originally ▁from ▁D ord recht , ▁and ▁was ▁the ▁son ▁of ▁an ▁officer ▁in ▁the ▁Royal ▁Dutch ▁Army , ▁Johan ▁Antoine ▁Pom pe ▁van ▁Me er der vo ort ▁ ▁of ▁Le iden , ▁and ▁Johann a ▁Wilhelm ina ▁Hend ri ka ▁de ▁Mou lin ▁of ▁K amp en . ▁Pom pe ▁studied ▁medicine ▁at ▁the ▁Imperial ▁Academy ▁for ▁Military ▁Medicine ▁in ▁U tre cht ▁and ▁became ▁a ▁naval ▁sur geon ▁in ▁ 1 8 4 9 . ▁ ▁Pom pe ▁van ▁Me er der vo ort ▁tra ve led ▁to ▁Japan ▁in ▁ 1 8 5 7 ▁with ▁the ▁second ▁Dutch ▁military ▁mission ▁led ▁by ▁Lieutenant ▁Wille m ▁H uy ss en ▁van ▁K attend ij ke . ▁Since ▁the ▁beginning ▁of ▁the ▁sevent e enth ▁century , ▁the ▁r uling ▁Tok ug awa ▁sh og un ate ▁of ▁Japan ▁purs ued ▁a ▁policy ▁of ▁isol ating ▁the ▁country ▁from ▁outside ▁influ ences . ▁Foreign ▁trade ▁was ▁maintained ▁only ▁with ▁the ▁Dutch ▁and ▁the ▁Chinese ▁and ▁was ▁conducted ▁exclus ively ▁at ▁Nag as aki . ▁However , ▁by ▁the ▁early ▁nin ete enth ▁century , ▁this ▁policy ▁of ▁isol ation ▁was ▁increasing ly ▁under ▁challenge . ▁Following