Working in Japan while hired by an overseas company?

I know a working visa is required to get legally employed in Japan under a Japanese company, but are you able to stay there under a tourist visa working as an interpreter of an overseas company who needs dealing with Japanese firms? (salary would be paid in another currency and in an account outside Japan).

Edit: I found this in another forum
http://forum.gaijinpot.com/forum/working...s-question

He says:
" I work as a videographer in the US. I will be traveling Japan to produce a video on Japan for a travel agency here in the US."
"I'm concerned that because I'm being compensated for the work I'm doing in Japan that I may need to apply for a work visa. "

Some replies:
"It depends where you are paid. If you are paid from a US company from a US account into your US account, the 'tourist visa' is fine as this would be the same as a biz trip for negotiations, setting up or maintaining machinery, etc. Not sure if there are special restrictions for journalistic activities, though. "
"Yes, you wont need a work visa for that.
Of course, you wont say you are here to work, will you.
You will say you are here on holidays - which you are."

Looks like his case is similar to mine. Anyone had a similar experience?