SHIN ’ S PISTOL WAS a fifty-year-old Vietnamese imitation of a South American copy of a Walther PPK, double-action on the first shot, with a very rough pull. It was chambered for .22 long rifle, and Case would’ve preferred lead azide explosives to the simple Chinese hollowpoints Shin had sold him. Still, it was a handgun and nine rounds of ammunition, and as he made his way down Shiga from the sushi stall he cradled it in his jacket pocket. The grips were bright red plastic molded in a raised dragon motif, something to run your thumb across in the dark. He’d consigned the cobra to a dump canister on Ninsei and dry-swallowed another octagon.