Why is the space so big/wide in the Japanese IME compared to the English IME?


And is there a way to type a narrower, English style space while in the
Japanese IME? (Like a key combination?)




As you mentioned in your own comment, a half-width space can be typed by
Shift+Space. To answer your question about full-width space in your comment:

Since the Japanese characters are in squares with same width (as oppose to the
English letters with different width), it would be neat if all characters are
written in the same width. Since spaces are usually used for new paragraph
line head indent, full-width space can be used to indent the first line
neatly, like this:

>
> 今日は２０１８年１０月７日です。天気がいいから、散歩しましょう。今日は２０１８年１０月７日です。天気がいいから、散歩しましょう。今日は２０１８年１０月７日です。天気がいいから、散歩しましょう。
>
>
> 今日は２０１８年１０月７日です。天気がいいから、散歩しましょう。今日は２０１８年１０月７日です。天気がいいから、散歩しましょう。今日は２０１８年１０月７日です。天気がいいから、散歩しましょう。

This way, the characters are neatly aligned vertically character-by-character.




As you mentioned in your own comment, a half-width space can be typed by
Shift+Space. To answer your question about full-width space in your comment:

Since the Japanese characters are in squares with same width (as oppose to the
English letters with different width), it would be neat if all characters are
written in the same width. Since spaces are usually used for new paragraph
line head indent, full-width space can be used to indent the first line
neatly, like this:

>
> 今日は２０１８年１０月７日です。天気がいいから、散歩しましょう。今日は２０１８年１０月７日です。天気がいいから、散歩しましょう。今日は２０１８年１０月７日です。天気がいいから、散歩しましょう。
>
>
> 今日は２０１８年１０月７日です。天気がいいから、散歩しましょう。今日は２０１８年１０月７日です。天気がいいから、散歩しましょう。今日は２０１８年１０月７日です。天気がいいから、散歩しましょう。

This way, the characters are neatly aligned vertically character-by-character.

