Practical Issues of the 2026 Japan-U.S. Exercise with Typhon and HIMARS Entering Kanoya

The name Kanoya Air Base quietly appeared in a May 25 article by USNI News. The Japan Ground Self-Defense Force and the U.S. Marine Corps will conduct Resolute Dragon 26, and the U.S. military will host Valiant Shield 2026, overlapping in late June. As part of this notification, it was reported that the Typhon missile system and HIMARS will be deployed to the Japan Maritime Self-Defense Force Kanoya Air Base, and after training, they are expected to be stored at U.S. military bases within Japan.

This is not just a training schedule. It indicates a shift in the defense of the southwestern islands from the stage of "stationing troops on the islands" to the stage of "treating the islands, the mainland, and Guam as a single network of firepower, transportation, and command."

Two Exercises Overlapping on the Same Map

According to a May 22 announcement from the Joint Staff Office, the Self-Defense Forces' participation in Valiant Shield 2026 will take place from June 22 to July 1. The locations will include Self-Defense Forces and U.S. military facilities within Japan, Ishinomaki City in Miyagi Prefecture, Amami City and Ryukyu Town in Kagoshima Prefecture, surrounding air and sea areas, as well as Hawaii and Guam. The participating units will include the Joint Staff Office, Joint Operations Command, major commands of the Ground, Maritime, and Air Self-Defense Forces, Space Operations Group, and medical units.

On the other hand, Resolute Dragon 26 will be conducted from June 20 to 30, primarily involving the Japan Ground Self-Defense Force and the U.S. Marine Corps. According to USNI News, training areas will include Oita, Saga, Kumamoto, Kagoshima, Tokunoshima, and Amami Oshima in Kyushu, as well as Okinawa Island, Miyako Island, Ishigaki Island, Yonaguni Island, and Naha Base. The U.S. side is expected to involve the 3rd Marine Expeditionary Force, the 12th Marine Littoral Regiment, the 1st Marine Aircraft Wing, the 3rd Marine Division, as well as the U.S. Army's 3rd Multi-Domain Task Force, the U.S. 7th Fleet, and the 18th Wing at Kadena.

What I focus on is not the number of participating units but the geographical connections. Miyako, Ishigaki, and Yonaguni are forward nodes anticipating tensions east of Taiwan, while Amami and Kanoya serve as intermediate bases receiving rear support and anti-ship firepower. Guam and Hawaii are deep rear areas for munitions, aviation, and command. Handling these within the same schedule has implications beyond just the presentation of the exercises; it tests the wartime timetable.

The Significance of Typhon is Not Just Its Range

Typhon is a mid-range capability system of the U.S. Army, known for its concept of operating missiles like the SM-6 and Tomahawk from containerized launchers. It is said that there are no plans for live-fire exercises in Kanoya, but the mere presence of this equipment in southern Kyushu is a form of training. Can heavy launchers be moved in combination with ports, air bases, road networks, security, communications, fuel, maintenance, and personnel accommodations? This presents real challenges.

In last year's deployment in Japan, it was reported that Typhon was removed from the country after training. If there is a possibility that it will be stored at U.S. military bases within Japan after training this time, the political implications change significantly. It is currently unclear whether this can be called a permanent deployment, and the Ministry of Defense has not made that explicit. However, if a state can be created where re-deployment can occur within Japan rather than transporting from the U.S. mainland or Guam during crises, the launch posture along the first island chain could change in a relatively short time.

This also subtly connects to Japan's counterstrike capabilities. The Japan Maritime Self-Defense Force is preparing ships equipped with Tomahawks, while the Japan Ground Self-Defense Force is advancing towards longer ranges based on the improved Type 12 anti-ship guided missile capability. If the U.S. Typhon and HIMARS enter integrated anti-ship training around Kanoya and Amami, Japan's domestic firepower will not be treated as a complement to U.S. firepower but as another launch node sharing the same target information.

The Rescue Training in Miyako Island Appears Small but is Significant

Details from the Okinawa side should not be overlooked. USNI News reports that about 70 participants from Japan and the U.S. will conduct a small-scale disaster relief training using the JGSDF V-22, CH-47, JASDF C-130, and U.S. Marine Corps CH-53 in Miyako Island. It is also said that the U.S. Navy's LCU will join in Ishigaki Island. Taiwan News and Japanese reports have pointed out that this could be the first case of the JGSDF V-22 entering Miyako Island.

The term "disaster relief" is important for community explanations, but militarily, it is training for casualty evacuation and decentralized base operations. The runways and ports in the southwestern islands are limited, and once there is confusion due to missile attacks or cyberattacks, how to move severely injured personnel, maintenance parts, fuel, and communication equipment will determine the continuation of operations. During the Cold War, the JMSDF considered SLOC (Sea Lines of Communication) protection over wide maritime areas. In current southwestern defense, the issue of sea lines of communication has shrunk to the few hundred meters of roads within the islands, port handling capacities, and hospital reception capabilities.

Strengthening Deterrence and Tension in Acceptance Capacity

The term deterrence power between Japan and the U.S. is convenient, but for local governments, it manifests as concrete burdens such as noise, accidents, traffic regulations, hazardous materials, and base function enhancements. Considering past V-22 accidents and instability during landings, the vigilance from the Okinawa side is understandable. The Ministry of Defense notifying local governments of detailed training content is not just public relations but a political supply line to avoid losing operational foundations.

This reveals a weakness on the Japanese side. The performance of missiles, escort ships, and aircraft can be explained with numbers. However, the locations for storing munitions, security personnel to protect movement routes, prioritization with resident evacuations, and adjustments when ports compete with civilian logistics do not appear on equipment lists. The entry of Typhon into Kanoya is a signal for deterrence against China, while also being an event for China to observe Japan's domestic acceptance capacity.

Conclusion

The Japan-U.S. exercise in late June 2026 indicates that the defense of the southwestern islands is shifting from the concept of "stationing a small number of troops forward" to a multi-layered operational network connecting Guam, Kanoya, Amami, Miyako, and Yonaguni. Typhon and HIMARS symbolize that firepower, while the V-22, CH-47, C-130, and LCU symbolize sustained combat capability.

However, the true challenge is not the number of launchers. It is how quickly Japan can make political decisions and simultaneously manage local government explanations, port usage, medical evacuations, and munitions management. The deterrence along the first island chain will be tested not by the range of missiles but by whether peacetime procedures can withstand the speed of crises.

Main References

• USNI News, “Japan Announces 2 Major Western Pacific Exercises with U.S.” May 25, 2026
• Joint Staff Office “Participation in Valiant Shield 2026” May 22, 2026
• Joint Staff Office “Japan-U.S.-Australia Trilateral Exercise” May 22, 2026
• DVIDS “Resolute Dragon 26” feature page