Update Japanese language file for better translation

[ariarijp]

I think it is useful for for Japanese speakers.

[kensoh]

Hi Takuya @ariarijp this is good, thanks! Appreciate your PR to improve TagUI google translation.

Copying Ryzal @ryzalk and Alvin @Aussiroth who are now maintaining the project =)

[ryzalk]

Hi @ariarijp! Thank you so much for this contribution of yours :) I have merged the request.

Thanks @kensoh for the note! Cheers!

[ariarijp]

Hi TagUI team!

Thank you!

I will try to add an example of japanese-flow.