• Enhanced transport capacity: Weight increased from 4 tons to 5.85 tons (approximately 45% increase), volume increased from 49 m3 to 78 m3 (approximately 60% increase), a significant improvement over the previous model, "Kounotori." • After arriving at the ISS, it will be grasped by a robotic arm and docked with the Harmony module. • This mission will also feature new technologies such as "H-SSOD," "Mt.FUJI," "DELIGHT," and "SDX" as technology demonstrations. • Development of an advanced version is also underway with a view to supplying the Gateway, a manned lunar outpost, in the future. • The project also includes the technical demonstration of life support systems, such as the CO₂ Removal System On-Orbit Demonstration (DRCS), and aims to establish JAXA's proprietary technologies.
JAXA種子島宇宙センター@tnsc_JAXAAuto-translated from Japanese by Grok＼\ 🛰 H3 Rocket No. 7 Launch in 11 Days 🚀 /／From September 7 to September 11, four SRB-3 units were attached to the rocket!This time, it’s launching in its most powerful form 🔥Please show your support with #GoH3F7 😊✨ONE STEP AT A TIME!!
Space Intelligence@SpaceIntel101·The HTV-X1 spacecraft is stacked on the H3🚀 payload adapter and is ready to be enclosed by the 2 fairing halves.It will be HTV-X's maiden resupply flight to the International @Space_Station.Launch is currently scheduled for October 21 (UTC).https://x.com/tnsc_JAXA/status/1978386025895301297
Space Intelligence@SpaceIntel101·"The HTV-X1, stowed in the fairing, was transported to the [Tanegashima] VAB (Vehicle Assembly Building) and attached to the H3 rocket! This fairing is 20cm wider than usual. "Quote and credit: @tnsc_JAXA
Space Intelligence@SpaceIntel101·Transport to and arrival in the VAB.
Space Intelligence@SpaceIntel101After the HTV-X1 spacecraft was mated with the H3🚀, a "Late Access Door" in one of its fairings allows for the loading of final cargo.
Launch Postponement of New unmanned cargo transfer spacecraft1（HTV-X1） aboard the 7th H3 Launch Vehicle (H3 F7)October 19, 2025 (JST)Japan Aerospace Exploration AgencyThe launch of New unmanned cargo transfer spacecraft1（HTV-X1） aboard the 7th H3 Launch Vehicle (H3 F7) which was scheduled on October 21, 2025(JST), has been postponed due to a bad weather forecast on this date.Furthermore, as weather improvement is not expected at least until October 23, the new launch date will be announced once the outlook becomes clear.
Jonathan McDowell@planet4589·I've found some nice docs on the HTV-X1 launch (which I've cached at https://planet4589.org/space/misc/htv ) but nothing giving a pressurized cargo layout like we always got for the old HTV missions as illustrated here - @HTVX_JAXA or anyone, is one available?
Space Intelligence@SpaceIntel101The H3🚀 fairing's "Late Access Door" has been closed.Waiting for better weather for launch.Video credit: @tnsc_JAXA
油井 亀美也 Kimiya.Yui@Astro_Kimiya·Translated from JapaneseDue to bad weather, the launch of the HTV-X by the H3 rocket is delayed from the originally scheduled time. So, I made a teruterubōzu to pray for the weather to clear up from space. Since it's in space, there's no up or down, and I wasn't sure how to hang it, so I tried filming a video in a place with good weather lol.
@nvsliveTranslated from JapaneseThe NVS reporting team has entered the press room at Tanegashima Space Center. The photo shows the H3 Rocket No. 7 around 4:55. After this, we will proceed with preparations for the launch broadcast at 9:00:15. #nvslive #h3f7
Space Intelligence@SpaceIntel101Orbital Launch no. 236 of 2025 🇯🇵🚀 🚚📦8🛰️HTV-X1 | MHI Launch Services | October 21 | 0159 UTC@MHI_LS to launch the maiden flight of its new HTV-X space cargo transporter on its H3🚀 from Tanegashima space center, delivering about 6 tons of supplies to the International @Space_Station including eight micro🛰️.7🛰️ will be deployed from the ISS, 1 from the spacecraft after undocking from the ISS.The H3 itself flies for the first time with 4 SRB (Solid Rocket Boosters) and a wide, long fairing.
Space Intelligence@SpaceIntel101The mighty H3🚀 arrived at the launch pad before tonight's flight.
Jonathan McDowell@planet4589·LAUNCH at 0000 UTC Oct 26 of JAXA H3 flight F7 with the ISS-bound HTV-X1 cargo ship.
Any idea about whats the spacecraft name of HTV-X1. like we call Cygnus NG-23 as S.S. William "Willie" C. McCool what is HTV-X1 name?
Quote from: Chinakpradhan on 10/26/2025 03:43 amAny idea about whats the spacecraft name of HTV-X1. like we call Cygnus NG-23 as S.S. William "Willie" C. McCool what is HTV-X1 name?Great question. It's a new cargo carrier, and I've looked at many posts but didn't see any specific references other than being a "fruit delivery ship." I sent a request to JAXA. I'll post if they respond.
The first generation of HTV's were called Kounotori 1 thru 9.So maybe Kounotori X1 or Kounotori 10 ?
Translated from Japanese#HTVX's Space DiaryNice to meet you!I'm the new space station resupply vehicle, HTV-X!🛰️Following in the footsteps of the great predecessor "Kounotori," I've been tasked with delivering important cargo to the International Space Station!I'm a bit nervous for my first mission, but I'll trust in my companions and do my very best!💪I'd be thrilled if you could cheer me on for the journey that starts from here!😊
As with the HTV, if the first mission is successful and there's enough public interest, a nickname might be chosen for the second mission onward.
Quote from: Chinakpradhan on 10/26/2025 03:43 amAny idea about whats the spacecraft name of HTV-X1. like we call Cygnus NG-23 as S.S. William "Willie" C. McCool what is HTV-X1 name?Here is what I got back. It's quite strange:QuoteAs with the HTV, if the first mission is successful and there's enough public interest, a nickname might be chosen for the second mission onward.
Any press kit for HTV-X1 in English please?
Japan Aerospace Exploration Agency (JAXA) launched New unmanned cargo transfer spacecraft1(HTV-X1) aboard the 7th H3 Launch Vehicle (H3 F7) at 9:00:15 a.m.(JST) on October 26, 2025 from the Tanegashima Space Center.The Launch Vehicle flew as planned, and approximately 14 minutes and 4 seconds after the liftoff, the separation of HTV-X1 was confirmed.JAXA appreciates all for the support shown in behalf of the launch.
At 9:00:15 a.m. on October 26(JST), 2025, HTV-X1 was launched aboard the H3 Launch Vehicle No.7 (H3-24W) from the JAXA Tanegashima Space Center.Following its separation from the launch vehicle, communications and attitude control of HTV-X1 were confirmed, and the vehicle is now flying smoothly toward its arrival at the ISS.JAXA expresses its sincere appreciation for the support and cooperation extended by all those involved in the successful launch of HTV-X1.HTV-X1 is scheduled to arrive at the ISS on October 30(JST). Capture by the robotic arm “Canadarm2” on the ISS is planned for around 0:50 a.m. on October 30(JST), followed by berthing to the ISS on the night of October 30(JST).
HTV-X is now structural mate to the ISS (and "no exercice" constraint now lifted)
Quote from: centaurinasa on 10/29/2025 05:48 pmHTV-X is now structural mate to the ISS (and "no exercice" constraint now lifted)Do we have a berthing time?
Re: H3-24W F7 : HTV-X1 : Tanegashima : October 26, 2025 (00:00 UTC)Quote from: centaurinasa on 10/29/2025 02:59 pmCAPTURE confirmed at 15:58 UTC !!(some words from Kimiya Yui and then Aki Hoside)
CAPTURE confirmed at 15:58 UTC !!(some words from Kimiya Yui and then Aki Hoside)
Jonathan McDowell @planet4589Starlink Group 10-37 launched at 1635 UTC Oct 29 from Canaveral.Japan's HTV-X1 cargo ship arrived at ISS Oct 29 and was berthed at the nadir port on Harmony at 1850 UTC
Quote from: jcm on 10/29/2025 07:26 pmQuote from: centaurinasa on 10/29/2025 05:48 pmHTV-X is now structural mate to the ISS (and "no exercice" constraint now lifted)Do we have a berthing time?Was scheduled for 15:50:00UTC, the actual time was 15:58 UTC.Quote from: Salo on 10/29/2025 03:15 pmRe: H3-24W F7 : HTV-X1 : Tanegashima : October 26, 2025 (00:00 UTC)Quote from: centaurinasa on 10/29/2025 02:59 pmCAPTURE confirmed at 15:58 UTC !!(some words from Kimiya Yui and then Aki Hoside)
Quote from: russianhalo117 on 10/30/2025 03:27 amQuote from: jcm on 10/29/2025 07:26 pmQuote from: centaurinasa on 10/29/2025 05:48 pmHTV-X is now structural mate to the ISS (and "no exercice" constraint now lifted)Do we have a berthing time?Was scheduled for 15:50:00UTC, the actual time was 15:58 UTC.Quote from: Salo on 10/29/2025 03:15 pmRe: H3-24W F7 : HTV-X1 : Tanegashima : October 26, 2025 (00:00 UTC)Quote from: centaurinasa on 10/29/2025 02:59 pmCAPTURE confirmed at 15:58 UTC !!(some words from Kimiya Yui and then Aki Hoside)That's SSRMS grapple, not Harmony bething. I estimate the latter at about 1840 UTC soft capture 1850 UTC firmly berthed,but not certain and didn't see an official value
6 CubeSats to be deployed from the “Kibo” Japanese Experiment Module on Tuesday, February 3, 2026The following 6 CubeSats will be deployed from the “Kibo” Japanese Experiment Module as J-SSOD#35.Gxiba-1CoRALKNACKSAT-2HMU-SAT2(Teruteru)UiTMSAT-2LEOPARD
What's happening with HTV-X1? Is it still connected to the ISS?If we can see it at:https://www.nasa.gov/international-space-station/space-station-visiting-vehicles/The answer is yes! What next?
Fresh from the Dragon Crew-12 Mission Overview News Conference: Unberthing and departure planned for 1st week of March.
The next cargo craft to end its station mission is slated to be uninstalled from Harmony’s Earth-facing port with the Canadarm2 robotic arm in early March. JAXA’s (Japan Aerospace Exploration Agency) HTV-X1 will then be released by the Canadarm2 a day later into Earth orbit where it will complete several weeks of scientific experiments. HTV-X1 launched on Oct. 25, 2025, from Tanegashima Space Center in southern Japan and was captured with Canadarm2 and installed to Harmony Oct. 29.Flight Engineers Chris Williams, Jessica Meir, and Jack Hathaway, from NASA, and Sophie Adenot from ESA (European Space Agency) began packing the HTV-X1 on Friday with disposable cargo since JAXA’s spacecraft will reenter Earth’s atmosphere above the south Pacific Ocean for a destructive, but safe reentry. However, HTV-X1 will stay in orbit for a few more weeks after its release to test new antenna and solar cell technologies and deploy CubeSats for independent missions.
After delivering about 12,000 pounds of supplies, scientific investigations, hardware, and other cargo to the International Space Station for NASA and its international partners, JAXA’s uncrewed HTV‑X1 cargo spacecraft is scheduled to depart Friday, March 6.Watch NASA’s live coverage beginning at 11:45 a.m. EST on NASA+, Amazon Prime, and the agency’s YouTube channel in advance of the spacecraft’s release at 12 p.m. Learn how to watch NASA content through a variety of online platforms, including social media.On Thursday, March 5, flight controllers will use the space station’s Canadarm2 robotic arm to detach HTV-X1 from the Harmony module’s Earth-facing port on the station and maneuver it into position for release. NASA will not provide live coverage of the spacecraft’s detachment from the orbiting laboratory. NASA astronaut Chris Williams will monitor HTV-X1’s systems during undocking and departure.The HTV-X1 spacecraft will remain in orbit for more than three months acting as a scientific platform for JAXA’s experiments. Following the deorbit command, the spacecraft will dispose of several thousand pounds of trash during re-entry into Earth’s atmosphere, where it will burn up harmlessly.
Williams also trained for the departure of JAXA’s HTV-X1 cargo craft that launched to the space station in October from Tanegashima Space Center. He reviewed the procedures he will use when the Canadarm2 robotic arm releases the HTV-X1 into Earth orbit and when monitoring the Japanese cargo craft’s departure. Meir, after her spacesuit work, continued packing the HTV-X1 with trash and discarded gear.
Mission managers have given the go for a Japanese cargo spacecraft to depart the International Space Station at the end of the week. Meanwhile, the Expedition 74 crew is reviewing upcoming spacewalk procedures, packing a second cargo spacecraft for its departure, studying artificial intelligence tools, and conducting Earth observations.JAXA’s HTV-X1 cargo spacecraft is packed with disposable cargo and ready to complete its mission at the orbital outpost in two steps. First, at 1:25 p.m. on Thursday, March 5, the Canadarm2 robotic arm will uninstall the HTV-X1 from the Harmony module’s Earth-facing port and place it in a temporary parking position. Japanese mission controllers will then conduct sensor demonstration tests on the HTV-X1 while it is still in the grips of the Canadarm2.
