ISPs situation in Japan wrt IPv6

5+ ISPs are offering commercial services
tunnel, leased lines

25+ ISPs are offering experimental services

5+ IPv6 IXes are operational
(both commercial and academic)
44 ISPs are participating NSPIXP6

at least 1200 to 1500 /48 sites are in Japan
We can't count 6to4 sites reliably (so there could be more)