The Name Amakusa: Place and People
"Amakusa" is, first of all, a place name. Its origin has more than one theory, and through a history of mergers, the names of many towns have been gathered into this single name. This article traces how Amakusa came to be as a place name, then turns to the byname Amakusa Shiro and to Mizoka, a byname born of dialect.
The word "Amakusa" is not just a mark on a map. Its origin has multiple theories, and the 2006 merger folded the names of ten municipalities into the single name Amakusa City.
This article introduces, with sources, how Amakusa came to be as a place name, and the bynames given to people and aircraft, such as Amakusa Shiro and Mizoka.
Glossary terms covered here: Amakusa City, Amakusa Kami-shima, Amakusa Shiro, Mizoka, Amakusa Gokyo, Amakusa Daiou
How the Name "Amakusa" Came to Be
The place name Amakusa has several origin theories, appears as early as 744 in the Shoku Nihongi, and in 2006 ten municipalities merged under this single name.
Amakusa (origin of the name)
The origin of the place name "Amakusa" has more than one theory. One reads "ama" as people of the sea and "kusa" as the common folk; another traces it to "Ama-futaya," an old name appearing in the Kojiki's creation myth, said to have shifted over time into "Amakusa." The Nara-period record Shoku Nihongi already names "Amakusa of Higo Province" in the year 744, showing how long the name has been in use.
Source:「天草」の名前の由来について
Amakusa CityAmakusa-shi
On March 27, 2006, the cities of Hondo and Ushibuka merged with eight towns of Amakusa District, Ariake, Goshoura, Kuratake, Sumoto, Shinwa, Itsuwa, Amakusa, and Kawaura, creating the single new name Amakusa City. The names of the ten pre-merger municipalities did not vanish; they remain in daily use today as district names such as Hondo, Ushibuka, and Itsuwa within the city.
Source:天草市の紹介
Amakusa Kami-shimaAmakusa Kamishima
Some names within the Amakusa Islands describe relative position rather than compass direction. "Kami" (upper) and "shimo" (lower) in Amakusa Kami-shima and Amakusa Shimo-shima are the clearest example: the island to the north is called "upper," the one to the south "lower." Even a single name on a map hides a clue to how the islands sit in relation to one another.
Source:天草とは
Amakusa Gokyo (Five Bridges)Amakusa Gokyo
Names are not only given to places on a map; a bridge can earn one too. The five bridges linking the Kyushu mainland to the Amakusa Islands came to be known, from their 1966 opening, by the nickname "Amakusa Pearl Line." The plain, numerical "Five Bridges" and the more evocative "Pearl Line" both still refer to the very same crossing today.
Source:天草五橋(上天草十橋)
Bynames Given to People, Vehicles, and Animals
Amakusa Shiro is a byname rather than a birth name, and bynames reach beyond people, to the aircraft nickname Mizoka and the chicken breed Amakusa Daiou.
Amakusa ShiroAmakusa Shiro
"Amakusa Shiro" is a byname, not a birth name. When he was raised as supreme commander of the rebel forces in the Shimabara-Amakusa Rebellion, he appears to have come to be known by a name combining his supposed home region, Amakusa, with Shiro, a common given name of the era, while his birth name is traditionally given as Masuda Shiro Tokisada. As for where he was born, one tradition points to Uto City, another to Oyano Island, home to a farming family thought to be his father's.
Source:天草四郎の歴史
MizokaMizoka
The lone aircraft flown under the AMX brand, Amakusa Airlines, bears a nickname built from this very word, its fuselage painted with a dolphin. It stands as a living example of a dialect term carried on today as a name given to a vehicle.
Source:天草空港 みぞか号
Amakusa DaiouAmakusa Daiou
Bynames are not reserved for people and vehicles; a livestock breed can carry one too. The large native chicken raised in Amakusa during the Meiji and Taisho eras was given the grand name "Daiou," meaning great king, and after it vanished in the early Showa period and was later revived through research by Kumamoto Prefecture, it picked up a second byname: "the phantom local chicken." One creature now carries two names from two different eras.
Source:天草大王
FAQ
Is there a single settled origin for the place name Amakusa?
No, there is not. Multiple theories survive, including one reading it as "people of the sea" plus "the common folk," and another tracing it to "Ama-futaya" in the Kojiki.
Are the pre-merger town names no longer used?
They are still used today. Names such as Hondo, Ushibuka, and Itsuwa, the pre-2006-merger municipalities, survive as district names within Amakusa City.
What does the byname "Amakusa Shiro" mean?
Shiro was simply a common given name for young men of that era, closer to an everyday nickname than a formal surname. Think of it as a label that stuck through repeated local usage until it found its way into the history books.