Nuclear reactor in Matsue restarted for 1st time since 2012

The No. 2 unit is a boiling water reactor identical to those that formerly operated at the Fukushima Daiichi nuclear power station,

In additional to re-starting these outdated Gen 2 reactors as a stopgap solution, Japan should finally come around and invest Gen 4 systems, which are walk-away safe by design and do not produce plutonium. China is building several TMSR projects, which does Japan is sitting on its hands with this?