The data post is here:

Japan January PPI +0.6% m/m (expected +0.4%)

The index hit its highest since September 1985, at 109.5.

The data comes from the BOJ, price rises were most notable in raw materials. Global commodity price inflation continues.

Yen-based import prices were +37.5% y/y in January. The weaker yen is a key factor in this strong surge. Exporters are grinning though:

The graph from the BOJ report doesn't;t go back to 1985 ....

Japan ppi graph 10 February 2022