Konstantin has already pointed to the proper information about Hiragana and Katakana, so I'll focus on the Latin alphabet.
1) The base kit is ANSI only (plus the 1.25U Shift). This is fine, as long as the localization kit gets everything else right.
To support JIS (Latin): R4 \_ is missing. R1 7* should be 7' (bit-paired keyboard, remember!). R1 ¥| is missing.
To support English (UK): R4 \| is missing (also counts for English (US), PC style). R1 `¬ is missing.
Once a new diagram that combines everything is produced, I'll be happy to fine-comb it.