As a long-nose Phantom, the F-4EJ Kai’s nose has much to offer.
The F-4EJ Kai (“kai” meaning modified) is the modernized version of the F-4EJ, which was adopted for the Japan Air Self-Defense Force from the USAF F-4E. The F-4EJ removed the ground attack and aerial refueling functions from the F-4E, and added a data link to make the aircraft serve as an interceptor. The “Kai” variation was further modified to improve and modernize the F-4EJ, with changes mainly to the avionics including the radar and FCS (fire-control system) modernization. Even just for the nose area alone, the visible outward differences from the F-4EJ included the added lightning strips on the nose radome, the long flash suppressor at the tip of the fairing for the Vulcan cannon, the modified antenna for VHF/UHF transmission on the undercarriage door and more.

Explore the internal structure of the F-4EJ Kai’s evolved avionics.
The inside of the cockpit varies significantly between the U.S. Navy variations including the F-4J/S and the U.S. Air Force variations including F-4C/D/E. The most significant difference is that the U.S. Air Force variations had a control stick for the rear seat as well as the front. In that respect, the F-4EJ and F-4EJ Kai are based on the U.S. Air Force layout. The F-4EJ Kai features radar and FCS (fire-control system) modernization, navigation and communication system improvement, missile modernization, and bombing system improvement, with the AN/APG-66J contained in the nose radome. The radar scope and optical sight in the upper center of the instrument panel for the front seat were also drastically changed and the radar scope and radar antenna controller for the rear seat have a different shape and placement from the F-4EJ as well.