That is a Microsoft mouse. One of the early ones with steel ball. Xerox used this as well.
You can even see the same cutout for a manufacturer’s sticker on the lower front of the mouse.
I did a bit of research into the monitor. Originally I thought that it may be a variation of the Tandy CM-11 based on the on/off switch and the horizontal line. But looking at a video of that monitor (used by Commodore with the 128 a well) shows that the loud speaker(s) is/are on the lower side(s) near the front of the case like the 1080. Also, the headphone jack on the front, left side is in the general same location as on the 1080 (left side, front).
I think that this may be the same monitor as a 1080 internally, possibly the original Toshiba monitor on which the 1080 is based. I found a couple of other FCC ids with the same prefix (AGI9XA) as the 1080 monitor, but haven’t found any pictures yet. I may post on the X68000 group on Facebook which has a lot of Japanese users who are into vintage computing. Maybe someone recognizes it.