Wikipedia notes, quite briefly, that:
Emperor TaishÅ's short reign saw Japan develop stronger democratic institutions and grow in international power.
and that:
in 1925 universal male suffrage was introduced.
both of which point to a strong, growing influence of western political institutions. Given that this period coincided strongly with the women's suffrage movement (at least in the US and UK) did that similarly carry over in Japan? Clearly, women's suffrage wasn't happening just then, as even Men were just starting to gain it, but were there appreciable changes in the rights, and ability for civic engagement, of Japanese women in the early 20th century?
[1910s - Japan - Women's Rights]
Since you mentioned this in the FFA, and we are indeed quite weak in this area of history, I'll make a recommendation that will be of only marginal value. The closest thing I can think of for this is a book by Anne Walthall called The Weak Body of a Useless Woman. Unfortunately, it doesn't deal with quite the period you're asking about, being focused instead several decades earlier. I skimmed it once in a graduate seminar, and honestly can remember virtually nothing of value from it. But, hey, it exists.