210.191.0.0/18 covers 210.191.0.0 to 210.191.63.255, 16,384 IPv4 addresses. It is announced by AS2516 (KDDI Corporation). Every sampled address geolocates to Japan, with 69% in Tokyo. It is registered to an internet service provider. None of the sampled addresses are flagged as VPN, proxy or Tor.