Here are the current Japanese newspaper subscriptions — with complete historical coverage in most cases:
- Asahi: http://library.ohio-state.edu/record=e1001264~S7
- Yomiuri: http://library.ohio-state.edu/record=e1001163~S7
- Mainichi: http://library.ohio-state.edu/record=e1001435~S7
- Nikkei: http://library.ohio-state.edu/record=e1001423~S7
- Factiva (Sankei, etc): http://library.ohio-state.edu/record=b5574834~S7