"Boards of Canada's Seasons in the Sun" by Kevin Hainey http://www.exclaim.ca/index.asp?layid=22&csid=1&csid1=4491
Belgian magazine
Aug 03, 2002 at the latest (earliest archive date on IA)
Jockey Slut claims the first Boards of Canada interview appeared in their pages sometime in 1998 (iarchive).
1998 Badly Drawn Boy tells us that he's going to still record in his bathroom, even if he signs a three album deal! Boards Of Canada's first interview.
Issue #22
Source: http://www.clubculture.jp/magazine/archives/afterhours/
【インタビュー】 Boards of Canada、Vashti Bunyan、他。
(インタビュー means "Interview" according to babelfish)
"太陽の黄金の林檎" ("The Golden Apples of the Sun")
Vol. 46
Source: http://www.p-vine.com/app.php/mo/Shop/ac/ProductDetail/id/2920
side-A (January) cover BOARDS OF CANADA 特集:太陽の黄金(きん)の林檎:long interview: BOARDS OF CANADA
http://www.bekkoame.ne.jp/ha/p-market/past/vol46.html
COOKIE SCENE vol.46 JANUARY 2006/DECEMBER 2005 with 21 tracks compilation CD (950 yen + tax) side-A (January) cover BOARDS OF CANADA side-AA (December) cover DEVENDRA BANHART
http://www.bls-act.co.jp/bm/detail.php?wpid=2920<id=42&mgid=425
Referenced from the 2002 Grooves "collage" interview.
Author: Philip Sherburne
Possibly AP #166 (May 2002):
SPECIAL: GREAT BLEEP FORWARD: A.P.’S GUIDE TO ELECTRONICA’S MOVERS AND SHAKERS
Boards of Canada listed on cover (not that big though)
Referenced from the 2002 Grooves "collage" inteview.
Author: Nobuki Nishiyama (DJ)
Possibly FADER 07
SIDE-A CROSSFADR-Part.1 A02 A02: Boards Of Canada