Shonen manga (comics for boys) circulations

As I mentioned below, only Gan Gan is available in amazon.
I suppose mass-circulation magazines are sold at every bookstore, convenience store or kiosk, they don't need to be sold online. Above all, if it is a weekly magazine, it gets out of date too quickly.
I translated the report on the magazine circulations (average number per issue from September 1, 2003 to August 31, 2004) I found in Japan Magazine Publishers Association website.
Numbers with "*" are estimations which are not verified. (W) stands for "weekly" and (M) for "monthly"

Try magazines.

You can buy Monthly Shonen Gan Gan March issue which has Fullmetal Alchemist.

Hagaren(Fullmetal Alchemist) attractions

This Spring, from March 19th to May 8th, Universal Studio Japan will offer the Fullmetal Alchemist attractions.

Pre-order Yugioh R tankoubon

YU-GI-OH! R (1)
Manga Yugioh R will come out in tankoubon(graphic novel) on March 4th.
It has been serialized in monthly V Jump since 2004. Art by Itou Akira, supervision by Takahashi Kazuki.
It will contain 9 chapters.

A paper

Progress Against the Law: Fan Distribution, Copyright, and the Explosive Growth of Japanese Animation

Its analysis was very suggestive to me.

Pre-order Yugioh CDｓ

Sound track of the TV series Yugioh Duel Monsters will be released on March 25th.

Yugioh Duel Monsters Original Sound Track: Sound Duel 4
Here is the information by the agency, Geneon

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The same day a precious CD will be released!
It contains all of the opening and ending themes of the TV series Yugioh Duel Monsters and the ending theme for the Japanese version of the movie released in 2004.

Yugioh Duel Monsters Duel Vocal Best(working title)
It will contain:
Voice by Cloud
Genki no shower by Maeda Aki
Shuffle by Okui Masami
Ano hi no gogo by Okui Masami
Wild drive by Nagai Masao
Rakuen by Cave
Warriors by Ikuzawa Yuuichi
Afureru yuujou ga tomara nai by Ikuzawa Yuuichi
Overlap by Kimeru
Eyes by Ikuzawa Yuuichi
Fire by BLAZE (the vocalist, Ike is Ikusawa himself

Here is the information by the agency, Geneon

Pre-order Yugioh movie DVD

Japanese version of Yugioh movie will be released on March 16th.
You can pre-order it, however it is in Japanese and has no English translation. This DVD is encoded for Region 2.

Yugioh Duel Monsters: Pyramid of Light