Interesting article while we await the BOJ on the difficulties the International Energy Agency is having calculating China’s oil usage:

The International Energy Agency said it is changing the way it calculates China’s oil demand but acknowledged even this new method won’t be accurate because of shortcomings in official Chinese data.
“Few oil-market issues are more critical yet more elusive than getting Chinese demand right,” the industrial countries’ energy watchdog said in its latest monthly report, published Wednesday. But it said assessing current and past Chinese oil use remains more art than science.

IEA Tweaks How It Arrives at China Oil Demand (Wall Street Journal, mat be gated. Try a news search on the headline, might turn something up).