Some pages uses graphics generated from BCM SHOGI by Bernhard Maerz. This is unrestricted freeware.
More recent shogi boards uses shogi pieces and board graphics, "CC Resources for Shogi Applications" by "koma shokunin 1" from Bonanza project under creative common license. See below
Shogi Resource by muchonovski is licensed under a Creative Commons 表示-非営利 2.1 日本 License.
Based on a work at www.muchonov.com.