That's Academy's 1:48 scale Helicopter KV.107.
Tightly packed into the large box are 1 sprue for airframe, 4 sprues for the other parts of helicopter, one sprue with a clear parts. Molded in light gray plastic, highly detailed hub and rotor assemblies, extensive cockpit and cabin details, also possibility for open or closed rear loading ramp. Also various uathentic markings included.
Instrustion is laid out like most other Academy kits.

Historical information:

Kawasaki/Vertol KV107

KV107 helicopters were constructed by Kawasaki Heavy Industries under the lisence contract with Boeing/Vertol. These were used by not only Japan Defense Forces but also some foreign users such as Royal Swedish Navy, etc.