Complex sentence: For magazines, Wakamatsu Shizuko (Shizu) submitted her writings and translation mainly on either Jogaku zasshi or Hyōron which were published by Jogaku Zasshisha in Tokyo.
Split into simpler sentences: For magazines, Wakamatsu Shizuko (Shizu) submitted her writings and translation mainly on either Jogaku zasshi or Hyōron. Both magazines were published by Jogaku Zasshisha in Tokyo.