ical ▁Society ▁of ▁Japan . ▁He ▁often ▁visited ▁the ▁University ▁of ▁Tokyo ▁as ▁a ▁guest ▁of ▁Sh ok ichi ▁I yan aga ▁and ▁K uni h iko ▁K od ai ra , ▁spoke ▁fl uent ▁Japanese ▁and ▁in ▁Tokyo , ▁ 1 9 6 3 ▁married ▁Ya ek o ▁I se ki , ▁with ▁whom ▁he ▁had ▁a ▁son . ▁He ▁owned ▁an ▁a partment ▁in ▁Tokyo ▁for ▁many ▁years ▁where ▁he ▁spent ▁his ▁sum mers . ▁▁ ▁In ▁addition , ▁he ▁often ▁visited ▁Moscow ▁and ▁Saint ▁Petersburg ▁and ▁spoke ▁fl uent ▁Russian . ▁▁▁ ▁He ▁was ▁awarded ▁an ▁Alfred ▁P . ▁Slo an ▁Fellow ship ▁in ▁ 1 9 5 8 . ▁In ▁ 1 9 6 2 , ▁he ▁was ▁an ▁invited ▁speaker ▁at ▁the ▁International ▁Congress ▁of ▁Mathemat icians ▁held ▁in ▁Stockholm ▁( On ▁the ▁mod uli ▁of ▁Ab elian ▁vari eties ▁with ▁multip lications ▁from ▁an ▁order ▁in ▁a ▁totally ▁real ▁number ▁field ). ▁ ▁His ▁doctor al ▁students ▁include ▁Paul ▁M ons ky , ▁Tim othy ▁J . ▁H ic key ▁and ▁Daniel ▁B ump . ▁ ▁Bibli ography ▁▁▁▁▁▁▁▁▁▁ ▁On ▁the ▁orbit ▁spaces ▁of ▁arithmetic ▁groups , ▁in : ▁Ar ithmet ical ▁Al gebra ic ▁Ge ometry ▁( Proc . ▁Conf . ▁Pur due ▁Un iv ., ▁ 1 9 6 3 ), ▁Har per ▁and ▁Row ▁( 1 9 6 5 ), ▁ 4 – 1 0 ▁ ▁On ▁compact ifications ▁of ▁orbit ▁spaces ▁of ▁arithmetic ▁dis continu ous ▁groups ▁acting ▁on ▁bounded ▁symmetric ▁domains ,