Horizontal and vertical writing in East Asian scripts

Horizontal writing
Chinese name
Traditional Chinese	橫排
Simplified Chinese	横排
Transcriptions Standard Mandarin Hanyu Pinyin héngpái
Korean name
Hangul	가로쓰기 or 횡서(橫書)
Transcriptions Revised Romanization garosseugi or hoengseo
Japanese name
Kanji	横書き or 横組み
Transcriptions Revised Hepburn yokogaki or yokogumi

Transcriptions
Standard Mandarin
Hanyu Pinyin	héngpái

Transcriptions
Revised Romanization	garosseugi or hoengseo

Transcriptions
Revised Hepburn	yokogaki or yokogumi

Vertical writing
Chinese name
Traditional Chinese	縱排
Simplified Chinese	纵排
Transcriptions Standard Mandarin Hanyu Pinyin zōngpái
Korean name
Hangul	세로쓰기 or 종서(縱書)
Transcriptions Revised Romanization serosseugi or jongseo
Japanese name
Kanji	縦書き or 縦組み
Transcriptions Revised Hepburn tategaki or tategumi

Transcriptions
Standard Mandarin
Hanyu Pinyin	zōngpái

Transcriptions
Revised Romanization	serosseugi or jongseo

Transcriptions
Revised Hepburn	tategaki or tategumi

Many East Asian scripts can be written horizontally or vertically. The Chinese, Japanese and Korean scripts can be oriented in either direction, as they consist mainly of disconnected syllabic units and/or ideographic units, each occupying a square block of space, thus allowing for flexibility for which direction texts can be written, be it horizontally from left-to-right, horizontally from right-to-left, vertically from top-to-bottom, and even vertically from bottom-to-top. On the other hand, the traditional Kapampangan script, Mongolian script and its offshoots (like Manchu) are written vertically from top-to-bottom.

Horizontal writing is known in Chinese as hengpai (simplified Chinese: 横排; traditional Chinese: 橫排; pinyin: héngpái; literally: "horizontal alignment"), in Japanese as yokogaki (横書き, "horizontal writing", also yokogumi, 横組み), and in Korean as garosseugi (가로쓰기) or hoengseo (횡서; 橫書).

Vertical writing is known respectively as zongpai (simplified Chinese: 纵排; traditional Chinese: 縱排; pinyin: zōngpái; literally: "vertical alignment"), tategaki (縦書き, "vertical writing", also tategumi, 縦組み), or serosseugi (세로쓰기) or jongseo (종서; 縱書).

...
Wikipedia