If Japan is serious about wanting inflation then instead of flooding money into the global pool they should just turn to the UK and announce that they will soon -
Have UK energy companies running their utilities.
Have UK insurers insuring their cars.
Have UK government price tobacco.
Have any UK train company running their public transport.
Have UK's "PC World" fix their computers.
Have UK main dealers fix their cars.
Have UK local authorities run their car parks.
Have UK motorway service stations provide all fuel.
Have their children educated at English private schools.
Have all online billing done by Ryanair.
Have UK "payday loans" run their bank lending.
Have EasyJet supply all preprepared foods
Have UK Farmers' Markets supply all fresh food.
And then make everything organic.
That should scare the hell out of the population with respect to inflation expectations. It's worked wonders in the UK. Just a shame about no growth.
If they do need to go further then perhaps-
Have USA run their fighter jet programs.
Have France run fiscal policy.
Have Singapore tax their cars and price the beer.
Have Norway provide their holidays
Have Switzerland run their McDonalds.
Have Courchevel run their ski resorts.