Departure meal - Idetachi no Zen

Japanese: 出立ちの膳 - いでたちのぜん

…After the monks' ceremony, the coffin is taken out from the veranda. After eating the "Departure Meal," the body departs through the temporary gate. A bonfire is lit with a single handful of straw, and the tea bowl used during the deceased's lifetime is broken. …

From "Sake Ceremony"

...the act of exchanging sake cups and solidifying a promise. Sake was originally a special drink, brewed for religious ceremonies, and was passed around among many people to connect spirits with people, and between people, and to strengthen and confirm that connection. Eventually, sake cup ceremonies also came to be held when people vowed to form close relationships with each other. Since the early modern period, small cups have come into use as vessels for drinking sake, and people now drink from their own individual cups, but at New Year's toso and wedding ceremonies, people still drink from the same cup, and the original meaning remains.

From [Departure]

...The banquet held on the day of the wedding after the bride's belongings have been sent off, and the farewell meal with the bride's family when she leaves her parents' home are also called "detachi". When the funeral procession is taking place, relatives eat and drink at the "detachi no zen" (dinner for departure), and in some places, just before the funeral procession, mourners are given a single cup of sake using a bowl lid, which is called "detachi no sake". This is a custom that sees the wedding and death as farewells at the end of a long journey. ...

*Some of the terminology that refers to "Departure Meal" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…僧侶の式が終わると縁側から出棺する。〈出立ちの膳〉を食べた後，仮門をくぐり出発する。一把わらで送り火を焚き，生前使用の茶碗を割る。…

【盃事】より

…盃をとりかわしそれによって約束をかためること。酒はもとはハレの飲みもので，神祭に際して醸され，ひとつ盃を大勢で飲みまわして神霊と人，人と人を結合させたり，その結合を強化，確認するためのものであった。やがて人間相互の緊密な関係の誓いに際しても盃事が行われるようになった。近世以来酒を飲む器として猪口盃が普及しめいめいの盃で酒を飲むようになったが，正月の屠蘇（とそ）や婚姻の際の盃事ではまだ同じ盃で飲みかわしており元の意義を残している。…