Martinus V (English spelling) MartinusV

Japanese: Martinus V（英語表記）MartinusV

...The conflict between the two popes, which was accompanied by frequent military actions, became more serious as the political interests of each country became more complicated. In an attempt to resolve this, the Council of Pisa in 1409 elected Alexander V as the new pope. However, it ended up with three popes, and failed. It was finally resolved by the Council of Constance, which deposed two popes, voluntarily abdicated one, and elected the new pope Martin V. In East-West relations, the schism of Akakios (484-519) and the schism of Photius (858-886) are well known, but the schism between the Eastern Orthodox Church and the Church of Rome, which has continued since 1054 to the present day, is particularly noteworthy.

From the Council of Basel

…a council convened by Pope Martin V in Basel, Switzerland, from 1431 to 1439, with the objective of uniting the Eastern and Western churches and ending the Hussite Wars.

*Some of the terms that mention "Martinus V" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…たびたびの軍事行動をも伴った双方の教皇たちのこの対立は各国の政治的利害が複雑に絡み合って深刻化し，これを解決しようとした1409年のピサ教会会議はアレクサンデル5世Alexander Vを新教皇に選んだ。しかし，かえって3人の教皇を鼎立（ていりつ）させる結果に終わって失敗し，ようやくコンスタンツ公会議による2教皇の廃位と1教皇の自主退位，新教皇マルティヌス5世Martinus Vの選出によって解決を見た。なお，東西関係ではアカキオスのシスマ(484‐519)やフォティオスのシスマ(858‐886)が著名であるが，1054年から現代まで続いている東方正教会とローマ教会とのシスマがとくに注目される。…