*Kendo [#k0b9f049] #ref(http://t-nagase.sakura.ne.jp/pict/kendo/20151006-Men.jpg,left,nowrap,photo) -Affiliation Osaka Hikari Kenyu-kai -Metallic materials in Kendo "Mengane" is a metallic part of "Men (a protective gear for head and neck)"~ "Mengane" has changed with times;~ Fe-based alloy -> Duralumin (Al-based alloy)~ -> Duralumin (Al-based alloy) + Ti alloy.~ ~ #ref(http://t-nagase.sakura.ne.jp/pict/kendo/20151006-Men.jpg,left,nowrap,photo)