The hips lift, the chest lowers, the back arches into a long curve. The face turns down toward the bedding, and the hips alone remain raised. The inserting partner kneels directly behind, the angle of approach close to vertical. The configuration is older than most of its modern adopters realise: the Edo-period forty-eight-hands tradition catalogued the configuration under the name mongiri — “gate-cutting” — with the metaphorical reading running through “cutting open the entryway” or “passing under the gate of a shrine”.

Overview

Mongiri (Japanese: 門切り, mongiri; literally “gate-cutting”; English working translation: gate-cutting position; also known as torii-kuguri “passing-under-the-torii”) is a classical Edo-period sex-position name from the forty-eight hands catalogue. The position is a rear-entry variant in which the receiving partner adopts an exaggerated prone-quadruped posture: hips high, torso lowered, elbows or shoulders touching the bedding, head bowed. The inserting partner kneels directly behind, with the angle of approach close to vertical downward.

The configuration’s distinguishing feature is the depth of the receiving partner’s prone position. A standard rear-entry (ushiro-i, “back position”, or in classical vocabulary inu-kake “dog-mount”) leaves the receiving partner’s upper body partially raised, supported on hands or forearms. Mongiri lowers the torso further, with the receiving partner’s chest and shoulders touching the bedding while the hips remain elevated. The resulting body-line is an exaggerated curve, with the spine arched and the head bowed forward.

The position is treated in contemporary classification as a variant within the broader rear-entry family. The contemporary Japanese vocabulary of tanetsuke puresu (“seed-planting press”) and koshi-daka bakku (“hip-high back”) names configurations that overlap substantially with the classical mongiri, with the contemporary names operating in production-vocabulary while the classical name survives primarily in scholarly literature on the forty-eight-hands tradition.

Etymology

The classical Japanese name mongiri (門切り) compounds mon (門, “gate”) with kiri (切り, the nominal form of kiru, “to cut”). The semantic reading runs through several plausible interpretations.

The first reading treats the metaphor as physiological: the female anatomy is named as the “gate”, and the position-name reads as “cutting the gate” — a direct and somewhat coarse metaphor for the act of penetration as a forceful entry through the body’s threshold. This reading sits comfortably within the Edo-period tradition’s tolerance for the directly-anatomical naming-register.

The second reading treats the metaphor as architectural: the position evokes the gesture of passing under a Shintō shrine gate (torii) or under a castle gate, with the receiving partner’s bowed head and lowered posture echoing the gate-passing gesture. The Edo-period erotic prints depicting the position occasionally include a torii overlay in the background of the print’s composition, which would support this reading by showing the visual analogy directly. The alternative name torii-kuguri (“passing under the torii”) makes this reading explicit.

The third reading treats mongiri as related to mongiri-gata (“paper-pattern cut from a stencil”), with the position-name reading as “cutting from the standard pattern” — a more abstract reading that situates the position-name within the broader vocabulary of pattern-and-variation in Edo-period craft and design. This reading is the most speculative of the three and the most reliant on later Edo-period vocabulary developments.

The forty-eight-hands tradition’s playful approach to position-naming tolerates all three readings simultaneously, with the catalogue’s broader practice of layering multiple metaphors onto a single name as a recurring feature. The Edo-period audiences are likely to have moved between the readings without commitment to one as canonical.

Configuration and execution

The base configuration places the receiving partner in a prone-quadruped position with the torso lowered and the hips elevated. The knees are on the bedding, slightly apart, with the thighs near-vertical. The elbows or forearms are also on the bedding, with the chest and shoulders down. The head turns downward, the face close to or touching the bedding.

The inserting partner kneels directly behind the receiving partner, with the inserting partner’s thighs vertical and the inserting partner’s hips at the level of the receiving partner’s hips. The two hands of the inserting partner grip the receiving partner’s hips or buttocks for support and motion-control. The inserting partner’s body weight does not rest on the receiving partner; rather, the motion is generated through the inserting partner’s hip movement, with the inserting partner’s torso upright or only slightly forward.

The angle of approach is close to vertical-downward, with the resulting depth of penetration substantially greater than in standard rear-entry configurations. The angle directs the head of the inserting member toward the anterior vaginal wall (the side toward the receiving partner’s pubic bone), with associated emphasis on the Gスポット-and-anterior-fornix region. Edo-period commentary on the position describes the receiving partner’s response in terms suggesting that the period’s writers recognised this anatomical effect experientially, even where they did not have the explicit anatomical vocabulary that modern descriptions use.

The position’s principal distinguishing feature from the standard rear-entry is the receiving partner’s much lower torso position. The configuration overlaps with the contemporary prone-bone configuration (in English-language vocabulary) and with the contemporary tanetsuke-puresu and koshi-daka-bakku positions (in Japanese-language vocabulary), with the boundaries between the contemporary names and the classical mongiri designation soft enough that some authors treat them as effectively the same configuration under different historical labels.

Classical sources

Edo-period erotic publications including Makurabunko (Pillow Book Library) and Endō Nichiya Nyohōki (Day-and-Night Treasure-Book of the Erotic Way) place mongiri in the middle range of the forty-eight-hands position-vocabulary. The standard depiction is a side-view composition with the receiving partner deeply prone and the inserting partner kneeling behind, with the angle of penetration emphasised through exaggerated pelvic detail in the depicting print. Accompanying text-captions sometimes include the phrases “as if cutting the gate” (門を切るがごとし) or “the posture of passing-under-the-torii” (鳥居くぐりの姿), making the metaphor-and-position connection explicit.

The receiving-partner’s response, as described in the accompanying text-captions, includes phrases like “reaching the depth, the senses recede” (奥に届きて気を遠くす) and “the hips collapse” (腰の砕けるるばかり), which the modern reader recognises as describing the response associated with depth-penetration of the anterior fornix and adjacent regions. The Edo-period writers’ capacity to describe these responses, even without modern anatomical vocabulary, is one of the historically-interesting features of the forty-eight-hands literature.

Modern reception

The classical name mongiri has substantially fallen out of contemporary usage. Modern adult-content production uses the contemporary names tanetsuke puresu (“seed-planting press”), koshi-daka bakku (“hip-high back”), and the loanword-derived prone-bone (from English-language adult-vocabulary), with the classical name surviving primarily in three contexts: in scholarly treatments of the forty-eight-hands tradition; in period-set or classical-vocabulary-themed adult-content productions; and in tradition-revival contexts that explicitly invoke the forty-eight-hands catalogue.

The folkloric and cultural-historical interest of the name persists, however. The “passing under the gate” metaphor encodes a pre-modern conception of sexual contact as a passage-through-threshold or rite-of-passage, with the connection to Shintō shrine-architecture (the torii as the boundary between the sacred and the everyday) giving the position-name a notably culturally-embedded register. The Edo-period tradition’s capacity to embed sexual practices within the broader cultural-religious vocabulary, rather than holding them strictly separate, is one of the tradition’s distinctive features.

Variants and adjacent positions

Standard quadruped (inu-kake): the basic rear-entry quadruped configuration, with the receiving partner’s upper body raised on hands. Mongiri lowers the upper body substantially from this baseline.

Rear-entry / back-position: the contemporary umbrella term for rear-entry configurations, of which mongiri is a deep-prone variant.

Tanetsuke-puresu (seed-planting press): the contemporary Japanese-vocabulary name for a configuration in which the inserting partner presses down over the receiving partner in a deep prone configuration. The configuration overlaps with mongiri substantially, with the contemporary name emphasising the pressing action where the classical name emphasised the gate-cutting metaphor.

Prone-bone (English-language vocabulary): the contemporary English-language name for the deep-prone rear-entry configuration, again overlapping with mongiri.

The continuity across these different naming-vocabularies is essentially a single configuration receiving different names in different traditions and different eras. Mongiri is the historical Edo-period name for what contemporary practice would more typically call prone-bone or tanetsuke-puresu.

Cultural reception

The forty-eight-hands tradition’s preservation of the mongiri name in scholarly literature has given the name a continued cultural-historical presence even where the contemporary practice-vocabulary has moved past it. The cultural-historical interest of the name draws from several sources: the gate-cutting metaphor’s encoding of an earlier conception of sexual contact as boundary-passage; the integration of Shintō religious imagery (the torii overlay in the Edo-period prints) into the position-naming; and the broader pattern of the forty-eight-hands catalogue’s drawing-on of the everyday Japanese visual-cultural landscape for its position-names.

From a folkloric perspective, the mongiri name and its associated metaphor of passage-through-threshold opens onto the broader question of how pre-modern sexual cultures organised the meaning of sexual contact. The mongiri metaphor’s framing of the act as a “passing-under” or “cutting-through” of a threshold belongs to a register of sexual meaning that the modern vocabulary has largely lost, with the resulting cultural memory accessible only through this kind of historical-vocabulary engagement. The continuing presence of the name in scholarship preserves this register as a recoverable cultural element.

Related Terms

• Back position (rear-entry) — the broader configuration family
• Inu-kake (dog-mount, classical rear-entry) — the standard classical rear-entry
• Forty-eight hands — the parent classification system
• Shunga — the print-medium where the position-name appears