Japan is looking to have a stealth demonstrator flying within the year:

Japan’s defense ministry’s Technical Research and Development Institute (TRDI) is planning to unveil the country’s advanced technology demonstrator-experimental (ATD-X) plane within months; the lightweight stealth aircraft is scheduled to make its maiden flight later this year, Japan’s defense minister Itsunori Onodera has confirmed. ATD-X is positioned to become Japan’s next generation stealth fighter, replacing 94 locally produced F-2 that entered service in the year 2000. Speaking to the foreign affairs and defense committee of Japan’s upper house, Onodera said the indigenous fighter demonstrator is few months behind schedule.

Powered by two afterburning turbofans each developing 11,023 pounds each (5,000kg), the aircraft is designed for maximum takeoff weight of 28,659 pounds (about 13 tonnes). With a wingspan of 9 meters (29.85 feet), and overall length of 14.174 meters (46.5 ft) the ATD-X (dubbed ‘Shinshin’) will be smaller than the F-35 and much smaller, compared to Chinese or Russian stealth fighters.

I cannot see any space for any meaningful internal stowage, so I would guess that it is in the same category as Have Blue, basically a technology demonstrator, or they are contemporaneously developing some sort of stealthy external carriage.