Documents

Overview of IPv6 Fix (HTML in Japanese)
Overview of IPv6 Fix (Text in English)
Toward deprecation of ip6.int (HTML in Japanese/English)
IPv6/IPv4 fallback and DNS queries (PDF in Japanese)
IPv6/IPv4 fallback and DNS queries(updated) (PDF in English)
Survey of Hotel Internet Service Problems (HTML in Japanese)
Survey of Hotel Internet Service Problems (HTML in English)