In 1989, one actress changed the industry. A bust advertised at 110.7 centimetres: Kimiko Matsuzaka.

Kimiko Matsuzaka (松坂季実子, Matsuzaka Kimiko) is a Japanese AV actress who debuted with Diamond Eizo in 1989. The body of works developed as the label’s exclusive performer, together with the promotional strategy surrounding them, is referenced in media history and the history of body representation as the event that cemented the popularisation of the word kyonyuu (busty) in modern Japanese. This article centres on her industry- and cultural-historical significance and describes only matters confirmable in secondary sources.

Overview

Matsuzaka appeared in the late dawn of the Japanese adult-video industry at the end of the 1980s. At the time, the industry was in a rapid growth phase after the spread of the home VCR, and competition to differentiate among labels was beginning. The emerging label Diamond Eizo, under the lead of AV director Toru Muranishi, was developing a promotional strategy built around a particular bodily attribute. Matsuzaka’s debut is positioned as the culmination of that strategy.

The reason her name is so often referenced in industry history is that her works functioned as a catalyst that made the very word kyonyuu socially visible, beyond their individual commercial success. Rio Yasuda’s The Birth of the Busty (2017) positions her debut as the core period in the popularisation of the word and leaves an empirically grounded account based on industry sources.

Career

Before the debut

Matsuzaka is said to have been scouted while enrolled at a women’s junior college in Tokyo and to have come to appear in AV. She is reported to have initially planned only a single appearance, but to have continued in the industry after recognition spread following the release of her debut work. Secondary sources note that her stage name combined the surname of the actress Keiko Matsuzaka with the given name of the actress Kimiko Ikegami.

Diamond Eizo and 1989

In 1989, Matsuzaka debuted as an exclusive performer for Diamond Eizo. The label was run with AV director Toru Muranishi at its centre and is remembered in industry history as one of the labels that symbolised the rapidly growing Japanese AV industry of the late 1980s and early 1990s.

Concurrent with her debut, the label ran a repeated promotion designating “the first of every month as Busty Day.” Her works were released monthly, and each is said to have sold continuously from several thousand to around ten thousand copies. Diamond Eizo grew rapidly in 1990, and an Associated Press article reporting her popularity is said to have circulated worldwide around the same time.

The advertised bust of 110.7 centimetres was, according to the organisation of industry sources, not necessarily an actual measurement but a promotional figure functioning as a wordplay number read as “ii onna” (a fine woman); industry figures including Nobuhiro Motohashi record testimony that the actual measurement was in the 90-centimetre range. Either way, what matters from a cultural-historical view is that this number was repeated through magazines, video packaging, and in-store displays and entered social circulation.

From the 1990s

Through changes in Diamond Eizo’s circumstances and structural shifts across the industry, Matsuzaka changed her mode of activity over the course of the 1990s. This article avoids any definitive statement about her later circumstances that could be to her detriment, and confines itself to the position of her performing period within industry history.

Industry-historical significance

The “before/after Matsuzaka” periodisation

In the organisation of industry research and critical writing, a “before/after Matsuzaka” periodisation marked by her debut is often used as a convenience. In AV up to that point, a performer’s bodily attributes were merely components of an overall appeal; after her, it was confirmed within the industry that a particular body part could draw an audience on its own.

This change affected the design of camera angles on set, the composition of jacket photography, and the style of advertising copy. The prototype of an industry visual culture that continues to the present (camera positions making the chest the lead, package photos emphasising the upper body, copy foregrounding a size figure) was largely established in this period.

The socialisation of the buzzword kyonyuu

The word kyonyuu itself was already partly in circulation as an industry term or coinage in the 1980s. But the centre of the process by which it acquired the status of general vocabulary, via media outside the industry (photo weeklies, men’s general magazines, television talk shows), lies in Matsuzaka’s works and Diamond Eizo’s sustained promotion.

Yasuda’s The Birth of the Busty (2017) organises the popularisation of the word not as the result of a single event but as the simultaneous interaction of four factors: the founding and editorial policy of photo weeklies, the rapid growth of the AV industry, Diamond Eizo’s concentrated promotion, and the concrete figure of Kimiko Matsuzaka.

Cross-media spread

Matsuzaka’s name and the figure “110.7 cm” were repeated across media beyond AV packaging, into photo-weekly features, evening-paper headlines, and men’s-weekly gravure. The editorial policy of the late-1980s photo weeklies FOCUS and FLASH, which actively took up female personalities’ bodily features, entered a resonant relationship with the AV industry’s advertising strategy in this period. That resonance succeeded in bringing the evaluative axis of kyonyuu outside the AV industry, and the chain of media conventions from the 1990s onward was strongly influenced by the editorial culture of this period.

Cultural references

Re-evaluation in secondary sources

From the 2000s, industry researchers and journalists such as Rio Yasuda and Nobuhiro Motohashi made the Diamond Eizo era and Matsuzaka’s debut a subject of re-evaluation within the postwar Japanese history of media and body representation. These works tend to take as their object of analysis the industry structure, promotional technique, and media environment surrounding her debut, rather than detailing her as an individual.

Reproduction in screen works

The Netflix series The Naked Director (2019) takes the rise and fall of Toru Muranishi and Diamond Eizo as its subject. The series is fiction that includes dramatisation, but it carried significance as an occasion for renewed social awareness of the Diamond Eizo–era AV industry.

See also

• Kyonyuu (busty)
• Bakunyu
• Adult video
• History of AV
• AV bubble