イオン交換 でした
ionkōkandeshita
1. Was ion exchange.
Noun
#303458
1. Was ion exchange.
1. pupil; disciple
1. diplomat
1. diplomatic mission; overseas diplomatic establishment
1. good feeling; good will
1. exchange; interchange
1. ion
1. high official
1. becoming a pupil (of); becoming an apprentice
1. official residence