The Ki-61-I hei is a Japanese fighter. It has been in the game since the start of the Open Beta Test prior to Update 1.27.

The "Hei" modification of the Ki-61 still retains the above average manoeuvrability, common to the Japanese aviation tree. However, the Hei Hien has some faults - its top speed is only 20 km/h higher than that of the early "Zeroes". Its climb rate is enough for its role, and it retains energy fairly well. While its acceleration holds itself pretty well, Its top speeds are not on par with other aircraft making it similar to the German Bf 109 G-6. Its guns are also a hit and miss - it is equipped with the deadly MG 151 20 mm cannons, and it can also equip German belts with Minengeschoß shells. However, the Japanese 12.7s are lower velocity and a bit on the weak side. The Hien's ammo count is average, albeit not as much as American aircraft. One thing to be noted is that the landing flaps are very effective and will slow you down even if you use WEP. That said, use them when you are trying to make somebody on your six overshoot you.

The Hei Hien's armament is flexible, as it is able to equip multiple kinds of bombs. With accuracy and shot placement, the large ammunition pool can work to your advantage. Equipping the air targets belt for the MG 151 cannons is the best choice for air combat. It features a high degree of Minengeschoß shells, specially made German HE shells with thin walls. There is no 20 mm cannon shell in the game with more high explosive than the Minengeschoß. As for the 12.7s, Stealth or Air target belts are your best bet. The best choice of bomb loadout is the 250 kg bombs due to the lack of precision needed. A pilot can miss a direct hit on a pillbox and still destroy it.