Complex sentence: In 1862, the Edo government dispatched envoys to various European schools for the deaf.Then The first school for the deaf was established in 1878 in Kyōto, and it wasn't until 1948 that deaf children were required to attend formal education.
Split into simpler sentences: In 1862, the Edo government dispatched envoys to various European schools for the deaf. However, the first school for the deaf wasn't established until 1878 in Kyōto, and it wasn't until 1948 that deaf children were required to attend formal education.