イオン交換 でしょう
ionkōkandeshō
1. Ion exchange, likely.; Probably ion exchange.
Noun
#302673
1. Ion exchange, likely.; Probably ion exchange.
1. diplomat
1. diplomatic mission; overseas diplomatic establishment
1. good feeling; good will
1. exchange; interchange
1. ion
1. high official
1. official residence
1. it seems; I think
2. right?; don't you agree?
1. Not a diplomat.; Not an official.