He's killed about ten thousand sisters, if he did it at a rate of 8 sisters per day, that would be:

10000 / 8 = 1250 days

Or about 3 years and 5 months.

Could the experiment have been running for that long?

1 Answer 1


In a nutshell, Accelerator went through almost 10K sisters indoors. As a result of this, he was able to efficiently kill many sisters.

Assuming he "works" for 12 hours, killing a sister every 8 minutes on average, he would go through 9800 sisters in 4 months.

Source: http://toarumajutsunoindex.wikia.com/wiki/Level_6_Shift

It is unknown how long the experiments went on, however, seeing as Nunotaba Shinobu has talked to a clone wearing a winter uniform, and that Accelerator has killed the first clone who wore a summer uniform, one can assume that the experiments went for several months during the autumnal, winter or spring seasons—at least the preparations of the clones—before being stopped. Furthermore, several experiments have been executed within the premises of research facilities until being moved during May of the contemporary year.

In May of the current year, the experiments moved to the outside and empty places. This is because of the requirements of the battlefield, as such experiments 1 to 9802 have been performed inside, while the remaining 10198 experiments would be dealt outside.

  • So less than a year, that would mean he killed more than 27 sisters per day. This also answers why just until now they found out about the experiments. Thanks!
    – noko
    Aug 2, 2013 at 15:08
  • 1
    @noko yea, the rumors didn't really start until he hit 9900 mark because that was when they started having the sisters wander around Aug 2, 2013 at 16:04

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