The first; It's 100k/Mo/kid, though other numbers have been floated[1] and the current subsidy is already 40kJPY for low-income families[2], where "low-income" is below the average[3].

[1] https://mainichi.jp/english/articles/20220420/p2a/00m/0na/00... [2] https://www.japantimes.co.jp/news/2021/11/11/national/politi... [3] https://wagaya-japan.com/en/journal_detail.php?id=5866