Ocean Freight Costs from Japan: Charges Explained
What gets added on top of the base ocean freight rate, the main forces that push rates up or down, and what to check when you’re comparing quotes from different carriers.
01Ocean freight = base rate + surcharges
The number a carrier or forwarder quotes you is rarely just the base ocean freight (O/F). It’s the base rate plus a stack of additional charges layered on top. Comparing two quotes on “freight rate” alone isn’t really comparing total cost.
| BAF / FAF | Bunker (fuel) adjustment factor. Revised periodically in line with fuel oil prices |
|---|---|
| CAF / YAS | Currency adjustment factor, to offset exchange-rate movement against the currency the rate is quoted in |
| THC | Terminal handling charge. Applied at both the load port and discharge port; amount is port-specific |
| DOC / B/L fee | Documentation charge, e.g. for issuing the bill of lading |
| PSS | Peak season surcharge, applied during periods of concentrated demand |
| Filing fees | Advance cargo filing charges such as ISF/AMS for US-bound cargo or ENS for EU-bound cargo |
Which of these apply, and what they’re called, depends on the carrier and the trade lane. This is a representative list, not a fixed set that’s always charged in full.
02What moves the rate
Ocean freight rates move with market conditions. The main drivers are:
Supply and demand — rates rise when cargo volume outpaces available vessel space. Demand tends to cluster ahead of major retail seasons and around Lunar New Year across many Asia-origin trade lanes.
Canal transit conditions — when the Suez or Panama Canal is closed, congested or operating under draft restrictions, vessels reroute onto longer voyages, and the added days and fuel cost typically get passed through into freight rates. The Panama Canal Authority, for example, has periodically adjusted daily transit numbers and maximum vessel draft in response to water levels in the canal watershed.
Port congestion — vessel queuing at a port effectively removes capacity from the market, tightening supply elsewhere in the network.
Fuel prices and geopolitical events — these feed through via BAF and, at times, ad hoc emergency surcharges. Carrier surcharges are not unregulated: on US trades, for instance, the Federal Maritime Commission requires a minimum notice period before a new surcharge takes effect, and reviews requests from carriers to shorten that period.
03What to check when comparing quotes
When you line up quotes from different forwarders or carriers side by side, make sure the scope of each quote actually matches. Three mismatches come up again and again.
First, destination THC. Some quotes bundle it into the freight rate; others leave it for the consignee to pay locally on arrival. The one that excludes it looks cheaper on paper.
Second, drayage (inland trucking). Whether transport beyond the port is included changes the total significantly.
Third, validity period. Ocean freight quotes can expire within days or weeks depending on market conditions. A quote valid for a long period may already have some of that volatility risk priced into it.
We compare rates across multiple carriers on a like-for-like basis and present quotes with the scope clearly stated, so you can see exactly what’s included before you book.
FAQFrequently Asked Questions
When does the rate actually get locked in?
The rate applied is the one in effect at the time of booking. Depending on market conditions, the rate can change between when a quote is first issued and when the cargo actually ships, so always check the quote’s validity period before you plan around it.
How much more does a 40ft container cost than a 20ft container?
It varies by trade lane and carrier, but the difference is generally not proportional to the extra volume you get — a 40-footer usually works out cheaper per cubic meter than splitting the same cargo across two 20-foot boxes. If your cargo has room to spare on weight, ask us for a side-by-side comparison for your specific volumes.
Can fuel surcharges be negotiated?
BAF is generally calculated from a published formula tied to fuel indices, so there’s limited room to negotiate it on its own. The more practical levers are comparing total landed cost across carriers and choosing which carrier to book with.
About this guide
This guide is written and edited by the OCEAN FREIGHT JAPAN (SK.inc) editorial team, based on hands-on freight-forwarding experience and primary official sources. Content reflects information current as of the publication date — for the latest regulations, please check official sources directly.
Related services
Read other guides
Talk to Us About Ocean Freight from Japan
Tell us your load port, discharge port and cargo details, and we’ll compare rates from multiple carriers for you. Account registration is free.
Get a Free Quote