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Fixed Temperature (恒溫 Kōon?) is the 117th chapter of the Toaru Kagaku no Railgun manga series, released on August 27th 2019 in Monthly Comic Dengeki Daioh.


Major Events


By order of appearance:




  • This marks the first time that Uiharu has used her power in the manga.
  • Uiharu's flower had withered due to heat in the room, but it went back to normal after drinking water.


  • Uiharu recalls memories of her promise with Saten that she would not disappear suddenly like Saten's friend.[1]
  • Tsurigane is still considering her duty for Oumi Shuri, despite betraying her.[2][3] Also, Tsurigane did not know that she had been expelled from the Kouga by Oumi Shuri due to being unconscious at the time.[4]
  • Saten uses the alias "Saten Akemi" as she disguised herself. This is a reference to her friend, Akemi. whose last appearance was in chapter 80.[5]

Cultural References

Unanswered Questions

  • What is happening to Kimi's arm?



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Toaru Kagaku no Railgun
Volume 1 1234567
Volume 2 8910111213
Volume 3 141516Sp17Sp1Sp2
Volume 4 181920212223
Volume 5 24252627282930
Volume 6 31323334353637
Volume 7 3839Sp4041424344
Volume 8 4546474849505152
Volume 9 535455565758596061
Volume 10 626364656667686970
Volume 11 71727373.5747576777879
Volume 12 808182838485868788
Volume 13 8990919293949596
Volume 14 979899100101102103104105106
Volume 15 107108109110111112113114115
Volume 16 116117118119120121122123124125126127
Volume 17 128129130131132132.5132.75133134135136
Chapters Not Yet in Volume Format 136.5137138139
Special 17.524.525.542.596.5122.5