I have about 10 packages of personal goods, 2 of books, 2 of kitchen
utensils and appliances, 4 of clothes, and 2 of snowboard equipment,
all used, that I need to ship from Honolulu to Tokyo at the end of
this week. We need the stuff to arrive in Tokyo within about 4 weeks.
What is the easiest way to get this done? My financee is Japanese and
we'll be moving back to Tokyo beginning of December.

Have you explored all traditional methods already? (i.e. USPS, DHL,
UPS, Fedex, etc.)

For a fee, I believe per package or by weight, you can take the items
with you on your flight back to Japan. That way you don't have to wait
for them to arrive or worry about them arriving before you do. Also,
you'd want to call ahead and rent a van or truck when you arrive at
the airport.

rent a boat and ship to Tokyo, this is cheapest way. if you don't mind
money ,so just take all your luggage to the plane.

You want to be carefull when choosing a company to move personal
goods.  There are freight forwarders or shipping comapnies that can
accomodate your needs, and there are what they call removal companies,
re-locating companies (if you will).  The difference is that the
shipping companies do not get involved in the packing and the crating
of teh shipments, hence, their price will be much less expensive,
where remaoval companies get involved in estimaing your re-packing and
provide you of a more complete service by coming to your home and
pack, shrink wrap and crate all what is neded to be shipped prior to
transportation overseas.  From your question and explanation, I
gathered that you shipment is pre-packed, and I think that you are
better off dealing with a shipping company or a typical freight
forwarder.  Naturally, there are companies that do both, the packing
and the shipping, but, more often than none, you'll find them more
expensive than shipping companies.

Here is what I recommand, go to google search, search for "online
shipping companies" get a couple of rates, compare them and then call
these companies;

www.dhl-usa.com
www.fedex.com
www.ups.com
www.homeshipping.com
www.emeryworldwide.com

good luck