Free Nautical Charts

Can you tell me whrere to find free printable nautical charts?

Where can I download a free nautical chart of Japan? I will be traveling from the states to Alaska, then make my way into Japan. Where can I download a free, large scale, high resolution nautical map of Japan?

free online nautical charts for Sydney.? Hi there, being a fisherman i want to find an online chart of sydney harbour with the different depths etc, so far all i can find is pay to view sights, has anyone had any luck with this? also they tell me that Google earth has got something out as well but i think that it has to do with oceans only , thank you all