It had the objective of acquiring information on N-series launch vehicles, orbit injection, and tracking and control.

A power supply issue caused Ume to stop functioning one month after launch.

While it was originally intended to gather data for only a year and a half, UME-2 ceased operations on 23 February 1983.

The JAXA website states that "we learned some valuable lessons on satellite separation technology and apogee engine from this experience".

[13] KIKU-4 was developed to acquire data on designing earth observation satellites with high power requirements.