Both hands and both knees on the tatami, the body taking on the configuration of an animal. The partner approaches from behind, hips closing toward the receiving partner. One faces forward, one connects from behind, and the gazes do not meet. Edo-period erotic literature named this position without circumlocution: inu-kake (犬かけ位, “dog-mount position”). By naming the animal-mating-configuration directly, the classical text simultaneously recorded the instinctive-reproductive and the playful-erotic registers of sexual practice within the same word.

Inu-kake (Japanese: 犬かけ位, inu-kake-i, “dog-mount position”; English: doggy style, dog position; Edo-period vernacular: 犬掛け, 犬畜生, 四つ手) is the back-position-class member within the Edo-period shijūhatte (forty-eight-positions) system in which the receiving partner takes a four-limb configuration with both hands and both knees on the surface, and the inserting partner approaches from behind in a kneeling or straddling posture. The configuration is the most direct classical-Japanese ancestor of the modern back-position / doggy style category in adult content.

Etymology

The name inu-kake derives from a direct visual-metaphor: the receiving partner’s four-limb configuration is read as analogous to the canine mating posture. Edo-period erotic literature frequently used animal-metaphor naming for sexual positions — uma-nori (“horse-riding” for cowgirl-class), kaeru-hari (“frog-stretch”), neko-naki (“cat-cry”) — and inu-kake sits as the most foundational member of this animal-naming series.

The Indian Kāmasūtra contains a parallel animal-metaphor position-name, dhenuka (the “cow position”), with similar structural-configuration in the back-position class. The cross-cultural universality of animal-metaphor naming for the rear-entry configuration suggests both the visual-similarity of the posture and the cross-cultural association of the configuration with animal-instinctive sexual practice.

Distinction in vocabulary

The Anglophone doggy style compound parallels the Japanese inu-kake in employing animal-metaphor naming, but operates as 20th-century vernacular-American-English vocabulary rather than as a classical position-name within an organised position-system. The Japanese inu-kake sits as the historically-fixed pre-modern term that operated as one member of the documented shijūhatte 48-positions system, with corresponding cultural-and-textual position-stability that the Anglophone vernacular has not historically had.

In modern Japanese vocabulary, the classical term inu-kake has largely been displaced by the more-neutral yotsunbai (四つん這い, “four-limb”), kōhai-i (後背位, “rear-back position”), bakku (バック, from English “back”), or doggī (ドギー, from English “doggy”). The classical term retains use principally in period-piece adult-content, shijūhatte-revival productions, and Edo-period-themed historical-fiction settings where the historical-vocabulary register is part of the work’s stylistic register.

Structural configuration

The basic configuration places the receiving partner with both palms on the tatami or floor, both knees spread to approximately shoulder-width, taking the four-limb posture. The back is either horizontal or slightly arched. The hip-height is adjusted to the inserting partner’s union-position. The inserting partner takes a kneeling or straddling position directly behind, with both hands grasping the receiving partner’s hips, buttocks, or waist for support, and the motion driven primarily by the inserting partner’s pelvic rhythm.

The insertion-angle varies broadly from shallow to deep, with adjustment-axes including the receiving partner’s hip-height, the inserting partner’s pelvic-positioning, and the inserting partner’s kneeling-versus-straddling configuration. Raising the receiving partner’s hips approaches the mongiri variant; lowering the hips approaches the prone-form (ne-bakku, “lying-back”). The configuration thus sits at the central node from which the rear-position variant family branches in multiple directions.

The gaze-configuration is structurally non-meeting. The receiving partner faces forward; the inserting partner looks down at the receiving partner’s back, hair, and nape. Without expression-exchange, the perceptual channel fills with the hip-motion, the buttock-flesh oscillation, the breathing-and-vocalisation, and the hair-disarray as the non-face-to-face sensory information.

Reception

The inu-kake position evokes a psychological register opposite to the face-to-face positions. With gazes not meeting, the emotional-exchange ritual is reduced and the corporal-and-instinctive register of sexual practice is foregrounded. The configuration has been read across history as a power-and-submission configuration; Edo-period erotic literature included the phrase “like a beast” alongside treatment of the configuration as a desirable kink-object, with the reading carrying mixed semantic content from both directions.

In contemporary adult content, inu-kake / bakku / back-position is one of the most-frequent insertion-positions, occupying one of the three principal staple-categories along with cowgirl and missionary. The reasons for the production-frequency include: (1) compositional convenience — the insertion-point, the inserting partner’s genital area, the receiving partner’s buttocks and hip-motion are all directly visible from the camera’s frontal angle; (2) motion-range — the deep-insertion and the wide-amplitude motion both fit naturally within the configuration; (3) genre-differentiation contrast — the position pairs differentially against the expression-emphasising missionary and the female-led cowgirl, supporting genre-internal differentiation.

In plump and large-bust productions, the buttock-and-breast oscillation during the rear-position is emphasised through camera-and-composition vocabulary. In beautiful-buttocks and athletic-frame productions, the buttock-form itself becomes the principal frame-content during the position.

Sub-forms within shijūhatte

The principal sub-forms within the shijūhatte system’s elaboration of the rear-position class include the following.

Mongiri (門切り): the high-hip variant in which the receiving partner lowers the head deeply and lifts the hips high. The configuration shifts the insertion-angle to a steeper downward trajectory.

Ne-bakku (寝バック, “lying-back”): the prone variant in which the receiving partner lies flat on the front of the body. The covering-configuration produces an intimacy-and-confinement register distinct from the kneeling form.

Tachi-bakku (standing-back): the standing-and-forward-leaning variant in which the receiving partner stands and leans forward, with hand-support on furniture or a wall.

Ekiben-class (駅弁, “station-bento”): the carrying-and-mounting variant where the inserting partner lifts the receiving partner in the rear-entry configuration.

These sub-forms share the non-face-to-face configuration while differing in insertion-angle, contact-area, and motion-control distribution.

Cultural and historical record

The term inu-kake largely disappeared from common usage after the Meiji-period modernisation, with modern Japanese using “yotsunbai”, “kōhai-i”, “bakku”, or “doggī” instead. The classical term does return in shijūhatte-revival contexts, period-piece adult-productions, and Japanese-themed adult content set in pre-modern environments, where the classical line “like a beast” sometimes appears as period-stylistic vocabulary.

From folkloric and historical-anthropological perspectives, the Edo-period willingness to name human sexual practice through animal-metaphor reflects a cultural framework that did not deny the reproductive-and-instinctive character of sexual practice but played with it openly. The Meiji-onward modernisation period brought a covering-over of this register, with medical-and-clinical position-vocabulary replacing the earlier animal-metaphor and play-vocabulary registers.

The continuing operation of the Anglophone doggy style vocabulary as a vernacular term, alongside the more-neutral rear-entry clinical vocabulary, parallels the structure of the Japanese vocabulary’s coexistence of classical animal-metaphor names (inu-kake in period-piece work) and modern neutral-position names (kōhai-i, bakku) across registers.

Related Terms

• Back position
• Mongiri (high-hip variant)
• Cowgirl (kijoui)
• Ne-bakku (prone variant)
• Shunga
• Shijūhatte (48 positions)