On 21st December 2001, the Japan Coast Guard encountered a North Korean spy vessel, the Changyu 3705, in the seas around Kyushu. After she refused an order to stop for a search, the Japanese ships fired warning shots across the Changyu’s bow. When the Changyu responded with small arms fire and rockets, a brief battle ensued in which over a thousand rounds were fired. The Changyu took a number of direct hits from Japanese autocannon, before exploding in what is believed to be a scuttling. She then sunk with the presumed loss of all hands. Three members of the JCG were wounded by small arms fire in the battle, which is also the only post-war incidence of Japanese forces engaging a hostile vessel in combat.

The wreckage of the Changyu was raised as part of the investigation, and a number of artefacts were recovered, including the weaponry pictured here. The full complement of arms on board was:

- 4x Type 88 rifles

- 1x Type 73 machine gun

- 2x Type 68 RPGs

- 1x B-10 recoilless rifle

- 1x shoulder-launched SAM of a type I do not recognise

- 1x ZPU-2 AA gun

Once the JCG had concluded their investigation into the incident and confirmed that the vessel was a North Korean ship operating illicitly, the wreck and contents were put on public display in Yokohama, where they remain to this day. The weapons have sadly been (extremely crudely) deactivated, but at least they’ve been preserved at all.