愛想の良い[aisonoii] affable
意想外[isougai] unexpected
仮想[kasou] imagination
仮想記憶[kasoukioku] virtual memory
仮想空間[kasoukuukan] virtual space (e.g. in computer graphics)

回想[kaisou] reflection
回想録[kaisouroku] memoirs
楽想[gakusou] melodic subject
感想[kansou] impressions
危険思想[kikenshisou] dangerous thoughts