The faces and profiles lined up on a phone screen, the modern motion of swiping left and right to send a “like”: their distant ancestors are the booths of a 1985 downtown telephone club, the 1990s arrangements over pagers and PHS handsets, and the registration forms of 2000s mobile sites. A half-century lineage of technology mediating how men and women meet crystallises in the business form called deai-kei.

Deai-kei (出会い系, “encounter-type”; dating site, in recent years “matching app”) is the general term for internet matchmaking services run to help men and women get acquainted. This entry covers the lineage from telephone clubs and dial-message services through PC and mobile dating sites to contemporary matching apps, and the framework of the 2003 dating-site regulation law.

Overview

The basic structure has the operator providing profile registration and communication, users making contact by browsing profiles and exchanging messages, and the contact developing into a real meeting. Billing models centre on charging men per message with free use for women, monthly membership, or point systems.

The spectrum runs from marriage-oriented serious-relationship services (Pairs, Omiai), to casual dating (Tinder, with), to friend-finding, to sexually oriented encounters, to compensated-companionship services such as papa-katsu.

Etymology

“Deai-kei” is a Japanese coinage that took shape in the late-1990s internet boom as shorthand for “sites aimed at encounters”. From the 2010s the words “matching app” and “dating app” ran in parallel. The Japanese term carries a slight negative tint (an implication of sexual relations, an image of youth prostitution), and recent mainstream apps tend to call themselves “matching apps”.

History

Pre-history: telephone media (1985–1995)

In 1985, Japan’s first telephone club (terekura), Tyrol, opened in Kanda, Tokyo. A male customer waited in a private booth while unspecified women phoned in from outside. In 1986 NTT launched the “dial message” service, enabling message exchange among strangers, and the 1989 Dial Q2 information service spawned “two-shot dial” one-to-one call matching. These ancestors of the contemporary communication base let people talk with the opposite sex non-face-to-face from home or work. From the early 1990s, pagers spread among the young and were used for message exchange among schoolgirls and students.

PC internet era (1995–2000)

The 1995 release of Windows 95, the spread of ISDN, and the 1996 commercialisation of the internet brought PC-based dating sites. Early services were simple bulletin-board forms, with urban heavy internet users as the core. In the same period the United States developed platforms such as Match.com (1995), which Japanese services partly referenced while developing independently.

Mobile era (1999–2008)

In February 1999 NTT DoCoMo launched i-mode, enabling internet access from mobile phones, and use by young women exploded. Representative sites such as Happy Mail and Wakuwaku Mail arose. This rapid growth ran in parallel with the spread of youth prostitution and compensated dating, and dating-site-mediated child-prostitution cases became a social problem after the 1999 child-prostitution and child-pornography law.

Regulation era (2003–present)

On 13 June 2003 the dating-site regulation law was promulgated and from September enforced in stages. It bars under-18s from seeking partners on dating sites, punishes inducement of children, and regulates operators. A 2008 amendment strengthened operator notification to the Public Safety Commission and the duty to verify users’ ages, making ID-based age verification at registration standard.

Matching-app era (2012–present)

In 2012 the United States released Tinder, and swipe-style matching apps spread worldwide. In Japan from 2014 to 2016, Pairs, Omiai, with, the Japanese rollout of Tinder, and marrish appeared in succession. Compared with earlier dating sites, matching apps offered smartphone-native interfaces, strict identity verification, marriage-oriented branding, and transparent monthly billing, achieving a degree of escape from the older negative image and settling in as an ordinary option for marriage and romance. As of 2024, the Japanese market is on a multi-billion-yen scale with cumulative users said to exceed twenty million.

Legal position

The dating-site regulation law (2003, amended 2008) makes internet matchmaking operators subject to notification, bars under-18 use, imposes age-verification duties, and punishes inducement of children. Youth prostitution and child-pornography harm passing through dating sites are also subject to the child-prostitution and child-pornography law, the Criminal Code, and prefectural youth-protection ordinances.

Cultural reference

Dating and matching apps are studied across sociology, economics and information science as central infrastructure of contemporary Japanese romance, marriage and sexuality. “Met through a matching app and married” has become entirely ordinary in Japan, settling alongside marriage agencies, arranged meetings, and workplace marriage as a standard form of encounter, and the field remains under continuous change and study.

See also

• Papa-katsu
• Compensated dating (enjo-kosai)
• Love hotel
• Fuzoku (sex industry)
• Nanpa
• Anti-Prostitution Law