The photo shows an unshaven Russian glaring into the distance from behind prison bars. It's a striking shot, so it is hardly surprising that when it was printed on a 4×6-meter banner and unfurled at an entrance to the 20-km exclusion zone around the Fukushima No. 1 nuclear power plant, the police officers on duty were somewhat perplexed.

"They came out and asked us what we were doing," explained Alex Plutser-Sarno, a member of the infamous Russian art group Voina, which has been holding similar "actions" around the world for the last few months.

The man in the so-called "Voina Wanted" photo is the group's leader, Oleg Vorotnikov, who was arrested in Russia in late 2010 after one of the group's more provocative artistic forays — the overturning of an empty police car. Vorotnikov was eventually released on bail after British graffiti artist Banksy donated $20,000 to the group, but he remains on international wanted lists — and hence the "Voina Wanted" actions that have been held throughout Europe, the United States and now Japan.