# Release date ISBN Volume
1 August 23, 2006 978-4-06-314423-9 Volume 1
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2 September 22, 2006 978-4-06-314428-4 Volume 2
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3 October 23, 2006 978-4-06-314433-8 Volume 3
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4 February 23, 2007 978-4-06-314440-6 Volume 4
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5 October 23, 2007 978-4-06-314473-4 Volume 5
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6 June 23, 2008 978-4-06-314510-6 Volume 6
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7 February 23, 2009 978-4-06-314544-1 Volume 7
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8 September 23, 2009 978-4-06-314581-6 Volume 8
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9 June 23, 2010 978-4-06-310672-5 Volume 9
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10 April 22, 2011 978-4-06-310736-4 Volume 10
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11 January 23, 2012 978-4-06-387801-1 Volume 11
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12 November 22, 2012 978-4-06-387850-9 Volume 12
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13 July 23, 2013 978-4-06-387909-4 Volume 13
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14 February 21, 2014 978-4-06-387956-8 Volume 14
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15 October 23, 2014 978-4-06-387999-5 Volume 15
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16 June 23, 2015 978-4-06-388062-5 Volume 16
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17 January 22, 2016 978-4-06-388109-7 Volume 17
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18 August 23, 2016 978-4-06-388170-7 Volume 18
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19 April 21, 2017 978-4-06-388251-3 Volume 19
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20 November 22, 2017 978-4-06-510362-3 Volume 20
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21 August 23, 2018 978-4-06-512433-8 Volume 21
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22 June 21, 2019 978-4065151808 Volume 22
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23 November 22, 2019 97-84065175071 Volume 23
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Chapters not yet in tankōbon format

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