Editing Kikai Caldera (section)

===Eruptive history since Kikai-Akahoya eruption===
Kikai is still an active volcano. [[Mount Iō (Iōjima)|Io-dake (Mount Iō)]], Inamura-dake (south coast of [[Iōjima (Kagoshima)|Satsuma-Io-jima]]), Tokara-Iwo-Jima (north east coast of Satsuma-Io-jima) and [[Shōwa Iōjima]] (Shin-Io-jima) are post-caldera volcanoes within it.<ref name="gbank"/>  Minor eruptions occur frequently on Mount Iō, one of the post-caldera [[subaerial]] volcanic peaks on Iōjima. Iōjima is one of three volcanic islands, two of which lie on the caldera rim.  On June 4, 2013, weak tremors were recorded. Shortly after, eruptions began and continued off-and-on for several hours.<ref name=GVP /> Io-dake is monitored for earthquake, gas and steam plume activity so that between the 2020 and 2023 eruptions it is known to have had continuous low grade activity.<ref name=GVP />

[[file:2015 Satsuma-Iojima Iodake.jpg|thumb|250px|[[Mount Iō (Iōjima)|Mount Iō]], a [[rhyolite]] [[lava dome]], May, 2015, viewed from the east]]
Eruptions occurred:<ref name="gbank"/><ref name="Maeno2005">{{cite journal|last1=Maeno |first1=Fukashi |last2=Taniguchi |first2= Hiromitsu |date=2005-05-20 |pages= 71–85|title=Eruptive History of Satsuma Iwo-jima Island, Kikai Caldera, after a 6.5 ka Caldera-forming Eruption |doi=10.18940/kazan.50.2_71|journal=火山 (Volcano)|volume=50 |url=https://www.jstage.jst.go.jp/article/kazan/50/2/50_KJ00003562590/_article/-char/ja/}}</ref>
*old Iwo-dake stage (stage OIo-I-II)
**phreatomagmatic eruptions and pumice fallout (stage OIo-I), followed by rhyolitic lava with continuous [[tephra]], resulting in a volcanic edifice (stage OIo-II)
**3250 BCE ± 75 years (uncalibrated) Old Iwo-dake
***OIo1a,b tephras<ref name="GVP"/>
**2450 BCE ± 840 years ([[tephrochronology]]) Old Iwo-dake
***OIo2a,b tephras<ref name="GVP"/>
* Inamura-dake stage (stage In-I-IV)
**basaltic lava flows and scoria-cone building (stage In-I-II), then phreatomagmatic eruptions (stage In-III), and then andesitic lava (stage In-IV)
**1830 BCE ± 75 years (uncalibrated) Inamura-dake<ref name="GVP"/>
***In-I tephra
**1090 BCE ± 100 years (uncalibrated) Inamura-dake<ref name="GVP"/>
*young Iwo-dake stage (stage YIo-I-IV)
**continuing with a different magma source including rhyolitic lava and intermittent pumice
**280 BCE ± 75 years (uncalibrated) Iwo-dake<ref name="GVP"/>
**390 ± 100 years (uncalibrated) Iwo-dake<ref name="GVP"/>
**750 (tephrochronology) Iwo-dake<ref name="GVP"/>
**830 ± 40 years (uncalibrated) Iwo-dake<ref name="GVP"/>
***K-Iw-P1 tephra
**1010 ± 40 years (uncalibrated) Iwo-dake<ref name="GVP"/>
*** K-Sk-u-3 tephra
**1030 ± 40 years (uncalibrated) Iwo-dake<ref name="GVP"/>
***K-Sk-u-4 tephra
**1340 ± 30 years (uncalibrated) Iwo-dake<ref name="GVP"/>
***K-Iw-P2 tephra
**1430 ± 75 years (uncalibrated) Iwo-dake<ref name="GVP"/>
** 13 Feb 1914 Tokara-Iwo-Jima<ref name="GVP"/>
**Sep-Nov 1934
***Submarine eruption with [[pumice]]
**7 Dec 1934 -Mar 1935 2&nbsp;km east of Tokara-Iwo-Jima<ref name="gbank"/>
***New island [[Shōwa Iōjima]] (Shin-Io-jima) with [[lava]] finally stabilised 19 January 1935
**1997-2003 Iwo-dake<ref name="gbank"/>
***Formation and enlargement of new pit crater inside the summit crater
**Apr-Nov 1998 Iwo-dake<ref name="gbank"/>
***Ash
**May-Aug 1999 Iwo-dake<ref name="gbank"/>
***Ash
**Jan, Mar, Oct-Dec 2000 Iwo-dake<ref name="gbank"/>
***Ash 
**Feb, Apr-Dec 2001 Iwo-dake<ref name="gbank"/>
***Ash
**May-Jul 2002 Iwo-dake<ref name="gbank"/>
***Ash
**Feb, Apr-Oct 2003 Iwo-dake<ref name="gbank"/>
***Ash 
**May-Apr, Jun, Aug-Oct 2004 Iwo-dake<ref name="gbank"/>
***Ash
**3-5 May, 3-5 Jun 2013 Iwo-dake<ref name="gbank"/>
***Minor eruptions
**2 Nov 2019 Iwo-dake<ref name="gbank"/>
***Minor eruption
**29 Apr 2020 Iwo-dake<ref name="gbank"/>
***Minor eruption
**6 Oct 2020 Iwo-dake<ref name="gbank"/>
***Minor eruption
* 27 Mar 2023 – 22 Nov 2023
***Minor eruptions<ref name=GVP />