qmk/layouts/default/fullsize_extended_jis/layout.json

[{a:7},"",{x:1},"","","","",{x:0.5},"","","","",{x:0.5},"","","","",{x:0.25},"","","",{x:0.25},"","","",""],
[{y:0.25},"","","","","","","","","","","","","","","",{x:0.25},"","","",{x:0.25},"","","",""],
[{w:1.5},"","","","","","","","","","","","","",{x:0.25,w:1.25,h:2,w2:1.5,h2:1,x2:-0.25},"",{x:0.25},"","","",{x:0.25},"","","",{h:2},""],
[{w:1.75},"","","","","","","","","","","","","",{x:4.75},"","",""],
[{w:2.25},"","","","","","","","","","","","",{w:1.75},"",{x:1.25},"",{x:1.25},"","","",{h:2},""],
[{w:1.25},"",{w:1.25},"",{w:1.25},"",{w:1.25},"",{w:3.25},"",{w:1.25},"",{w:1.25},"","","","",{w:1.25},"",{x:0.25},"","","",{x:0.25,w:2},"",""]