'Sex' is a natural for being written in English as 'Sex'
rather than in katakana as セックス
1. The English, at three letters, is shorter than katakana, which
writes it as four letters. It is easy to spell and has a bolder look.
2. The English has better standout against a Japanese text as background.
It also looks more sophisticated than katakana.
3. As a foreign word, an attempt is usually made to pronounce it as 'sex'.
Pronouncing it as 'sekkusu' sounds forced and
The following example from an advertisement for a monthly magazine is a good
Sennyū: Ichiban atsui yoru no machi
Nishi Kawaguchi, Kabuki-chō, Roppongi, Nagoya, Oosaka
Chō sekkusu supotto
Infiltration: Hottest streets of the night
Nishi-Kawaguchi, Kabuki-cho, Roppongi, Nagoya, Osaka
Super sex spots
A Google search in August 2003 revealed the following distribution on the Internet:
No. of occurrences