samhain

Japanese: samhain

…It is held on the night of October 31st. It is said to have originated from the ancient Celtic festival of Samhain. This is a festival to honor Samhain, the god of death, and to welcome the new year and winter, and it was believed that the souls of the dead return home on this night.

From [Tuesday]

… In eastern France, a high tower called Fackel is erected and burned on the feast day of St. John, and evil is thrown into the fire. In the Celtic culture of England, bonfires are lit during the Samhain festival, which marks the coming of winter, and people pray for the return of the sun. Since 1605, this event has been assimilated into Guy Fawkes Day (November 5th), giving rise to the custom of lighting bonfires and burning grotesque effigies of Fawkes, the mastermind of the conspiracy. …

From [Banquet]

… In agricultural societies, the harvest is the most important occasion for feasting. The Celtic samhain ("end of summer"; today St. Martin's Day) and the Nordic haustbóð ("autumn feast/harvest feast") both took place at the end of the livestock grazing season, when livestock that could not be fed by stored winter fodder were slaughtered. …

*Some of the terminology that mentions "samhain" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…10月31日の夜に行われる。古代ケルト人のサムハインSamhain祭が起源といわれる。これは死の神サムハインをたたえ，新しい年と冬を迎える祭りで，この日の夜には死者の魂が家に帰ると信じられた。…

【火】より

…　フランス東部ではファッケルFackelと呼ぶ高い櫓を立て，これを燃やす祭りが聖ヨハネの祝日に行われ，邪悪とされるものを火に投じる。イギリスのケルト文化圏では冬の到来を表すサムハインSamhain祭に焚火がたかれ，太陽の復活を祈った。この行事は1605年以来ガイ･フォークス･デー(11月5日)と習合し，かがり火を燃やし陰謀の首謀者フォークスをかたどった奇怪な姿の人形を火にくべる風習を生みだしている。…