Japanese Modern Back Portrait with Shoji Lighting

Subject:
{argument name="theme" default="Back view with Japanese lighting"}

Main Subject:
A vertical photo-style portrait. In the center of the frame, a single adult woman sits on a chair with her back to the camera. Her upper body down to her thighs is featured prominently, occupying more than half of the screen. A calm moment in the center of a quiet Japanese room, enveloped in low lighting and soft brightness through a shoji screen.

Person/Expression:
A woman with a delicate and elegant atmosphere, her long black hair flowing naturally. Her face is mostly hidden, focusing on the back of her head. Her head is tilted slightly to the right at an angle that beautifully shows the line from her neck to her shoulders and spine. Although her expression is not directly visible, a quiet and lingering presence is conveyed.

Clothing/Pose:
{argument name="clothing" default="A deep wine-red satin slip dress"}. Thin straps and a low-back design that is wide open at the back. The fabric creates natural drapes and glossy wrinkles from the waist to the seat. The woman sits on a chair with her legs folded and lightly spread to the left and right, and her arms drawn gently across her chest. A posture where the line of the back, shoulder blades, and the drop of the waist look natural.

Background/Light:
{argument name="background" default="A calm Japanese-modern interior"}. Tatami floor, dark wood frames, a shoji window on the right, and a hanging scroll on the back wall. In the back left, there is a vase with thin branches and leaves and a small indirect light; on the right, a wooden desk and a small vase with a single red flower. Include a bit of a low bed or the edge of a sleeping platform in the bottom left. The primary light is soft diffused light coming from the shoji on the right, and the fill light is warm indirect lighting from the back left. The overall tone is slightly bright but maintains quiet shadows. The light on the skin gently touches the shoulders, center of the back, and upper waist, with shadows being natural and not too deep.

Composition/Camera:
2:3 vertical orientation. The camera is almost directly facing the person's back, at a height slightly lower than eye level to mid-level. The person is placed in the center, creating a stable composition with the left and right wooden frames and background elements. The focus is on the back to the waist and the drape of the dress. The background is lightly organized but left enough to feel the atmosphere of the Japanese room. Natural compression typical of a medium-telephoto lens, with a depth of field that is not too shallow to keep the person clear while the background is slightly soft.

Texture/Style:
Realistic photographic expression. The skin is smooth but avoids excessive correction to maintain a natural texture. The satin is rendered with elegant luster and deep red gradations. The textures of wood, tatami, shoji paper, and vases are also natural. The overall style is cinematic, high-quality, and tranquil Japanese-modern photography.

Negative:
Unnatural spine or shoulder shapes, extra fingers, missing fingers, fused limbs, unnatural leg angles, poor contact with props, floating sensation, unnatural gravity, overexposure, plastic-like skin, shadows inconsistent with light sources, gibberish text, logos, watermarks.

主題：
{argument name="テーマ" default="和灯りの背中"}

主体：
縦構図の写真風ポートレート。画面中央に、背中をこちらへ向けて椅子に座る大人の女性を一人。上半身から太ももまでが主役として大きく入り、人物が画面の約半分強を占める。静かな和室の中央で、低い照明と障子越しのやわらかな明るさに包まれた、落ち着いた一瞬。

人物・表情：
黒髪のロングヘアを自然に下ろした、繊細で上品な雰囲気の女性。顔はほとんど見せず、後ろ姿を主体にする。頭はやや右へ傾け、首筋から肩、背骨のラインが美しく見える角度。表情は直接見えないが、静かで余韻のある気配が伝わるようにする。

服装・ポーズ：
{argument name="服装" default="深いワインレッドのサテン素材のスリップドレス"}。細いストラップ、背中が大きく開いたローバックのデザイン。布は腰から座面にかけて自然なドレープと光沢のある皺をつくる。女性は椅子の上に座り、脚は左右に折りたたんで軽く開き、腕は胸元の前でやさしく抱くように寄せる。背中のライン、肩甲骨、腰の落ち方が自然に見える姿勢。

背景・光：
{argument name="背景" default="和モダンの落ち着いた日系室内"}。畳の床、濃い木枠、右側に障子窓、奥の壁に掛け軸。左奥には細い枝葉の生けられた花器と小さな間接照明、右側には木の机と一輪の赤い花を挿した小さな花瓶。左下には低いベッドまたは寝台の端を少し入れる。主光は右の障子から入るやわらかい拡散光、補助光は左奥の暖色の間接照明。全体は少し明るめだが、静かな陰影は保つ。肌の受光面は肩・背中中央・腰上にやさしく入り、影は深すぎず自然。

構図・カメラ：
2:3の縦位置。カメラは人物の背中に対してほぼ正面、高さはやや目線より低めから中間程度。人物を中央に据え、左右の木枠と背景要素で安定した構図にする。背中から腰、ドレスの落ち感が視線の中心. 背景は軽く整理しつつ、和室の空気感が分かる程度に残す。中望遠寄りの自然な圧縮感、浅すぎない景深で人物を明瞭に、背景はほんのりやわらかく。

質感・スタイル：
リアルな写真表現。肌はなめらかだが過度な美肌補正は避け、自然な質感を残す。サテンは上品な艶と深い赤の階調を丁寧に描写。木、畳、障子紙、花器の素材感も自然に出す。全体はシネマティックで上質、静けさのある和モダン写真。

ネガティブ：
不自然な背骨や肩の形、余分な指、欠けた指、手足の融合、不自然な脚の角度、道具との接触不良、浮遊感、不自然な重力、過度な露出、プラスチックのような肌、光源と矛盾する影、文字化け、ロゴ、透かし