One of the wargames made by Tsukuda Hobby. The game covers the hypothetical situations in 1990 that was near future in those days. The sea lane deffence was loudly discussed in those days in Japan. Prime minister Nakasone made an announcement of unsinkable carrier for Japanese islands. The hypothetical enemy is Soviet union which was broken into pieces soon after the Nakasone's announcement. The map covers Sakhalin to Taiwang. But the combatsystem is quite tactical. Unfortunately there are only 3 scenarios. And 2 of them are just drills between US force and Japanese self-defence force. Very rare game even in Japan.