国際航路標識協会
こくさいこうろひょうしききょうかい
International Association of Marine Aids to Navigation and Lighthouse Authorities
路標 is read as ろひょう (rohyou) and means road sign.
ろひょう
rohyou
こくさいこうろひょうしききょうかい
International Association of Marine Aids to Navigation and Lighthouse Authorities