Has anyone actually used the "world eki-net" before ?

It seems that the cost for reserving a seat on this website is prohibitively high, since the charges shown does not include the basic fare.

I dont mind paying a "small" fee for the convenience, but a premium of something like USD50 above the standard cost of reserving a seat is a bit rediculous.

Am I misinterpreting the charges here, or is this really the premium one has to pay for using online seat reservations ?