There's no additional details on what this might be about but take note just in case. I will update this post later if there is any further information or even if there isn't.
Update: It seems that it will be an announcement where Kishida will unveil the final version of his child care policy. He will be proposing child care allowance for kids (¥15,000 a month) and until they graduate from junior high school (¥10,000 a month). This is largely to tackle this problem right here.