Ukraine warU.S., Japan and EU rush to close crypto loophole in Russia sanctions
Decentralized assets seen as haven with ruble crashing and banks cut off
Bitcoin-ruble trading volumes swelled in late February as Russia was hit with sweeping financial sanctions. © Reuters
KEITA SEKIGUCHI, Nikkei fintech editor
TOKYO -- Japan and its Western peers are racing to crack down on cryptocurrency transactions by Russians trying to dodge sanctions imposed after Moscow's invasion of Ukraine, but the effort faces enormous challenges because the targeted assets are decentralized and lack single administrators.