In the original Japanese documents written before 1946 or so, the writing system is slightly different from today. The main differences are:

• old kanji forms
• some old kana characters that since fell in disuse
• a greater number of differences between kana usage and pronunciation

Here are some common words whose writing has changed:

Further readingEdit

• Shinjitai (Wikipedia) for the change in kanji.
• Historical kana usage (Wikipedia) for the older use of kana.