We tracked Tokyo Toshokan since January 29, 2018. During last 30 days, it hasn't been working 29 times - on July 15, 2018, July 14, 2018, July 13, 2018, July 12, 2018, July 11, 2018, July 10, 2018, July 9, 2018, July 8, 2018, July 7, 2018, July 6, 2018, July 5, 2018, July 4, 2018, July 3, 2018, July 2, 2018, July 1, 2018, June 30, 2018, June 29, 2018, June 28, 2018, June 27, 2018, June 26, 2018, June 25, 2018, June 24, 2018, June 23, 2018, June 22, 2018, June 21, 2018, June 20, 2018, June 19, 2018, June 18, 2018 and June 17, 2018. The average response time is 0.156 sec which is very good. Note that response time may vary depending on how far you are from the Tokyotosho.info server located in Netherlands.