The simple shape of two people sitting and facing each other recurs from the oldest stratum of erotic literature onward; it is the body arrangement that an ancient Indian scripture recorded as upaviṣṭa (seated).

Sitting position (Japanese za-i, English sitting position) is the general term for coital postures in which both partners adopt a seated posture. In the narrow sense it denotes the face-to-face seated position (both partners seated and facing each other); in the broad sense it includes the rear seated position and the side-seated variant. Because neither partner lies supine or prone, the upper bodies press together over the maximum possible contact area, with gaze, lips, and chest all meeting at close range. Independent descriptions appear in the Kāma Sūtra, in Chinese bedchamber-arts texts, in the Heian-period Ishinpō, and in the Edo forty-eight hands, marking it as one of the classical positions worldwide.

Overview

In the sitting position both partners’ pelvises lie close together in a seated posture. In the face-to-face form the inserting partner sits cross-legged or with legs extended, and the receiving partner straddles the inserting partner’s hips while facing them. Both upper bodies are upright and the gazes meet horizontally. The arms typically encircle each other’s backs in an embrace.

In kinematic terms the sitting position is intermediate between the cowgirl position and the missionary position. The lead in insertion arises from the reciprocal cooperation of the receiving partner’s pelvic motion and the inserting partner’s hip motion. Because each partner’s weight is supported by their own seat, the posture is easier to maintain over a long period than most others.

Insertion depth varies widely with the partners’ pelvic angles: the receiving partner leaning back makes insertion shallow, leaning forward makes it deep. Because the arms encircle the back to form an embrace, sex manuals classify it as a high-intimacy position, “a posture for exchanging emotion between a couple.”

Etymology

The Japanese za-i derives from the anatomical term for “seated posture” in medicine and physiology. As a coital-position term it was introduced as a modern category in Meiji and Taishō sex-education literature.citation needed In Edo erotic books the corresponding postures were named individually with compounds containing i (to sit): i-jausu, i-chūbashira, and the like; no general term equivalent to za-i existed.

In English sitting position is standard, and the yoga-derived lotus position is applied to a variant of the face-to-face form. In Sanskrit the classical name is the upaviṣṭa recorded in the Kāma Sūtra; in Chinese the standard term is zuò shì.

History

A posture resembling the sitting position is described as upaviṣṭa (seated within) in the second book of the Kāma Sūtra (c. 4th–5th century CE): the inserting partner sits with legs extended and the receiving partner sits between the legs to join, an arrangement tied to a meditative ideal of union. In the Chinese bedchamber-arts classification of the “nine ways,” the corresponding posture is yú jiē lín (fish touching scales), a poetic name likening the seated, facing union to fish scales brushing together; it was quoted in the Heian-period Ishinpō (984).

In the Edo forty-eight hands the seated series was named individually with the prefix i (to sit). I-jausu denotes the face-to-face seated position, i-chūbashira a variant in which the receiving partner clasps one of the inserting partner’s legs, and tachi-nakabashira a transition from sitting toward a standing position. Edo erotic books depicted both face-to-face and rear seated forms, favouring compositions set against sliding doors or pillars. In shunga, the seated composition has the structural advantage of placing both upper bodies large in the frame, allowing the rendering of facial expression, hair, and the detail of upper-body dress; the prints of Suzuki Harunobu feature it often.

From the Meiji period the general term za-i entered academic usage through translated Western sex manuals. After the war the position was established as an independent category in the position taxonomies of manuals such as van de Velde’s Ideal Marriage (Japanese translation 1948) and Comfort’s The Joy of Sex (1972). In contemporary Japanese, taimen-za-i (face-to-face seated) and haimen-za-i (rear seated) have a degree of everyday recognition and occupy a corner of the basic-position repertoire in both manuals and AV genre labels.

Variant forms

The face-to-face seated form is the basic type: the inserting partner sits cross-legged, kneeling, or with legs extended, and the receiving partner straddles the hips, with the arms encircling each other’s backs and gaze, lips, and chest all meeting at close range. The rear seated form has the receiving partner face the inserting partner’s feet and sit backward; the absence of meeting gazes gives it a different psychological character, and in AV it is staged close to the reverse cowgirl so that the receiving body can be placed in the foreground.

In the chair seated form the inserting partner sits on a chair or sofa and the receiving partner straddles the hips; because the chair bears both partners’ weight, the posture is easy to sustain, and AV often pairs it with “office reception room” or “household sofa” settings. The lotus position has the inserting partner sit in the yoga lotus posture with the receiving partner straddling the hips; a variant tied to ancient Indian meditative and Tantric philosophy, it is presented as a distinct category in modern tantra-oriented sex manuals. Standing-to-seated transition variants maintain union while moving between sitting and standing, corresponding to the Edo tachi-nakabashira and the modern AV “rising sitting position.”

Reception and expression

Because of the large body-contact area and the closeness of the gaze, sex manuals position the sitting posture as “the position of intimacy,” centred on the exchange of emotion. In AV and adult manga the seated scene is often placed over an emotional climax: reconciliation, a confession, the high point of a relationship.

While the three principal positions, cowgirl, missionary, and doggy style, each form independent genre categories, the sitting position is more often folded into the grammar of staging as an intermediate posture. Its typical AV use is either as a transitional relay linking the three principal positions, or as the position into which the partners embrace as emotion rises.

In netorare works the very composition of “two people embracing while joined” can carry destructive psychological force, since gaze and embrace occur simultaneously, making the posture a strong, memorable sign of an intimate relationship.

See also

• Cowgirl position
• Reverse cowgirl
• Rear seated position
• Insertion
• Shunga