メンサ
Mensa International consists of around 134,000 members in 100 countries and in 54 national groups. The national groups issue periodicals, such as "Mensa Bulletin", the monthly publication of American Mensa, and "Mensa Magazine", the monthly publication of British Mensa. Individuals who live in a country with a national group join the national group, while those living in countries without a recognised chapter may join Mensa International directly.