Any cheap flights to Japan?

Travel Info
I'm in the UK (LDN) where can i get a cheap return to Japan. It has to be 拢400 or under open to suggestion e.g. leave from France or something to shorting the distance.

I invite your answers

Travel Tips

check out website

www.lastminute.com
www.expedia.co.uk

Others
To both shorten the distance and reduce the cost,you could try flying from Hong Kong.
When are you looking to go - think you'll be looking at nearer to 拢500 if you go in the next month. Virgin direct to Tokyo has great service.
Pesonal experience
yes i will say that japan air has some good fares try them
You'll be lucky to get a flight under 拢400, even if the flight is indirect. The prices quoted on a lot of these 'cheap' sites don't include tax. It also depends when you want to travel. Spring and autumn are the most expensive times.
Look at lastminute.com and price comparison sites, but remember to make sure the tax is included.

In response to the posting below, I'm going back to Japan at the beginning of May. My flight is several hundred pounds cheaper than the same flight in April. I'm going with JAL.
Travel between Japan and UK several times a year.