Why Don’t Japanese People Have Middle Names? (The Koseki Law)

The Samurai Chaos and the Meiji Reset

Historically, Japanese names were incredibly chaotic. During the Samurai era, high-ranking men had multiple names that changed depending on their age, status, or job (such as a clan name, an adult name, and a daily nickname). It was a confusing nightmare for record-keeping. When Japan rapidly modernized during the Meiji era in the late 19th century, the government needed a clean, unified system to collect taxes and manage the population. They created the “Koseki” (Family Registry) law, which strictly dictated that every citizen is only allowed one “Myoji” (Surname) and one “Namae” (Given Name). The concept of a middle name was completely erased for the sake of bureaucratic efficiency!

The International Struggle

Because the Koseki law has not changed, this creates a hilarious and frustrating headache for international couples or mixed-race children today. If an American-Japanese couple living in California names their baby “Kenji Michael Smith,” the US will happily accept it. But when registering the child at the Japanese consulate, the parents are forced to literally mash the names together into a single mega-name. On official Japanese paperwork, the child’s legal first name becomes “Kenjimichael.” It is a quirky bureaucratic hurdle that perfectly highlights the rigid, systemized nature of modern Japanese society!