We performed Br-gamma and [FeII] narrow band (R=100) imaging observations with IRCS on the Subaru Telescope, and showed that the Br-gamma emission exists in a molecular superbubble (MSB; Matsushita et al.2000) and is accompanied with the energetic starburst activity and explosions.
On the other hand, the distribution of [FeII] emission is not associated with MSB, although the line is a tracer of shock regions.
It may be due to high extinction.
There exist K-band peaks at the central region of M82 which are massive stellar clusters.
The one of them agrees with a X-ray point source which is considered to be a candidate of Intermediate Massive Black Hole (IMBH; Matsumoto et al. 2001).
We acquired K-band spectra (R=300-400) through three peaks, including the K-band counterpart of IMBH, using the IRCS on the Subaru Telescope.
No broad Br-gamma or HeI emission lines were detected.