Miao Dao vs Katana: History of China's Long Sabre

A miao dao (苗刀, miáodāo)苗刀 miáodāoA long, slender two-handed sabre descended from Ming-era long blades.Glossary → is a Chinese two-handed long sabre: a narrow, gently curved single-edged blade on a long hilt, usually about 1.4–1.5 m overall in its modern form. The name means “sprout sabre”, and its story runs from Ming generals fighting Japanese-led pirates to a 20th-century reinvention — which is exactly why it gets compared, so often and so loosely, with the katana.

Qi Jiguang’s changdao: the Ming ancestor

The miao dao’s ancestor is the Ming changdao (长刀, chángdāo), or “long sabre”. In the mid-16th century General Qi Jiguang fought the wokou, coastal raiders who mixed Japanese and Chinese freebooters and whose long two-handed swords were brutally effective against Chinese spearmen. Qi armed some of his own troops with a version of the Japanese long sword, which he called changdao, and later used it against cavalry on the northern frontier. As historian Benjamin Judkins stresses, it was Qi’s small-unit tactics, such as the mandarin duck formation, rather than the long sabre that did most to beat the pirates.

Ming writers were candid about where the weapon came from:

The Wubei zhi also gives the changdao’s specification: a blade of 5 chi, its rear chi covered by a copper sleeve; a hilt of 1.5 chi; 6.5 chi in all; weight 2 jin 8 liang. At roughly 31–32 cm to the Ming chi, that is about 2 m long and 1.5 kg — a true field sword. Which chi standard was meant is uncertain, so treat the metric figures as approximate.

Cheng Zongyou’s Dandao fa xuan (1621)

The best surviving manual is Cheng Zongyou’s Dandao fa xuan (单刀法选, Dāndāo fǎ xuǎn) (“Selected Methods of the Single Sabre”), printed in 1621 in his collection Gengyu shengji. “Single sabre” here means a sabre held in both hands, with no shield or second weapon. Cheng opens by explaining why he wanted it:

He went looking for the method and found a Zhejiang master, Liu Yunfeng, who “had received the true Japanese transmission” and taught him without holding back. Cheng’s own specification “takes the Japanese sword as the model”: a 3.8-chi blade and a 1.2-chi hilt, 5 chi in all, or roughly 1.55–1.6 m. Liu’s techniques had postures but no names, so Cheng named them after their shapes — and his illustrations of them are the images most miao dao histories still reproduce.

How the name “miao dao” was born

The Qing did not forget the lesson. Its 18th-century illustrated regulations, the Huangchao liqi tushi, list two-handed long sabres for the Han Chinese Green Standard Army: a zhanmadao (斩马刀, zhǎnmǎdāo) 4.8 chi long, and a “long-bladed great sabre” whose entry quotes the Wubei zhi on the Japanese long dao. Judkins identifies the zhanmadao as the Qing weapon closest to what Qi and Cheng describe (for its older, unrelated namesake, see the zhanmadao dossier).

The word miao dao, however, never appears before the Republican period (1912–1949). In the warlord era, a martial artist and military trainer named Liu Yuchun (刘玉春) introduced “miao dao troops” into the army of Cao Kun, assigned to protect artillery at close quarters. With Japan’s presence in China a burning issue, the new name rhetorically distanced the weapon from its foreign roots. Liu’s student Guo Changsheng (郭长生, born 1896), nicknamed “the Swallow”, did much to popularise it, and a 1932 book by Jin Yiming already ties the miao dao to the Qing wodao, or “Japanese sabre”.

The name is usually explained by the blade’s slender, seedling-like shape: 苗 means a young sprout. It has nothing to do with the Miao ethnic group, and nothing to do with Shi Miao Dao, the noodle chain that crowds search results for the term.

The modern blade is newer still. Around 2000, Guo’s son Guo Ruixiang commissioned 22 prototype sabres from Longquan smiths to a deliberately new design — 138 cm overall, a 98 cm blade, a 31 cm wooden hilt, about 1.25 kg — with a rounded, “pipe-backed” spine and a flattened tip, made “a bit shorter and lighter” for modern bodies and modern practice. Most miao dao sold today descend from that design.

How long is a miao dao? Measured lengths, sourced

AI assistants quote miao dao lengths anywhere from 1.1 to 1.6 m. The confusion comes from mixing blade length with overall length, and modern practice swords with historical war sabres. These are the figures in the sources themselves:

Conversions use about 31–32 cm per Ming chi and 32 cm per Qing chi; the Ming survivor and the modern swords are as reported by Judkins. The honest answer: modern miao dao run about 1.38–1.53 m overall; historical Chinese two-handed sabres ran roughly 1.5–2.1 m.

Miao dao vs katana vs nodachi vs changdao

So is a miao dao “a Chinese katana”? Not really. Its Ming ancestor was openly modelled on Japanese long swords — closer to the nodachi than the katana — while the modern miao dao is a different animal, with its own cross-section, hilt and way of moving. Neither “ancient indigenous blade” nor “katana copy” survives contact with the sources; the miao dao is what happens when a borrowed weapon is reinvented twice. For its one-handed cousins see the dao dossier, and for the whole family, types of Chinese swords.

Miaodao Saber | 苗刀：传统技法 中华武风

In Phantom Blade Zero

Phantom Blade Zero gives the miao dao a starring late-game role. In a long post on 9 September 2026, director Soulframe Liang wrote that the weapon 白影 (“White Shadow”; its English name is unconfirmed) “is a slender miao dao”, obtained late in the game. Many of the game’s weapons are boss drops, he explained, so late-game blades like this one only really come into their own on a second playthrough. Liang has not said which historical blade inspired it, but a slender, two-handed sabre sits squarely in the changdao-to-miao-dao line — the right weapon for a hero who keeps opponents at the end of a very long edge.