[Translators] Japanese translation update

[UTUMI Hirosi]

Hello,

On Fri, 15 Dec 2017 12:52:36 +0000
Paul <claws at thewildbeast.co.uk> wrote:

> On Fri, 15 Dec 2017 13:48:42 +0100
> Andreas Ronnquist <mailinglists at gusnan.se> wrote: 
> 
> > It would be nice with some kind of confirmation when one submits an
> > updated translation.  
> 
> Would it?
> 
> Does everyone (every translator, that is) agree?

Some kind of confirmation is a must.
But I don't like the closed way like "send a mail to a man".
Other developers/translators can't check it.
e.g. Other Japanese translators can't fix my new translation.

I like Transifex best for translation.

Regards,
Hirosi