Few other information regarding F-3 published last year. Maybe it was uploaded on this thread but I haven't seen it.
Development timeline
"Intended to replace F-2 starting from 2035"
From above (green) to below (yellow) :
"preliminary and detailed design"
"EMD prototype production"
"ground testing"
"flight testing (testing to continue after this timeline for the development of additional and improved capabilities)"
"manufacturing of first mass production model"
Current schedule regarding the future fighter development
"System integration contractor (ie main program contractor) to be chosen December this year (2020)" - MHI selected
"Planning to reach an agreement with the US and UK for the international cooperation and to lay basic structures of the development schedule" - LM selected as system integration and airframe design TAC, NG to support the development of data link with Japan-US interoperability, co-development of radar with UK (probably BAE) and ongoing negotiation over possible co-development of the engine (RR)
from left to right and above to below (in a reading order) :
★"deduction of rough estimation of program cost and schedule"
★"announcement of government budget for 3rd year of Reiwa (CE 2021)"
"reviewing the methods of contract and development system"
"selection of system integration developer"
"conceptual and preliminary design" (continuation from DMU probably)
★"selection of international partner"
"agreement with the US and UK (specify the areas of cooperation)"
"detailed adjustment of international cooperation with partner nations (US & UK)"
Ways to enable the higher level of (system) integration in the future fighter jet program
"While developing the legacy aircraft such as F-2 or P-1, MoD has contracted individual system providers (i.e. multi-prime) for each components such as the airframe, engine, avionics, etc. Due to such reason the interconnection and cooperation between these system providers were limited."
"Since the advent of 5th generation fighters, it was crucial to achieve higher levels of integration within the whole avionics architecture and system, thus it was necessary that coordination between the airframe, engine and avionics to achiever higher levels of low observability. Therefore it is important to set up a development structure which is suitable for the realisation of such higher levels of integration."
From left to right, each aircraft followed by another :
F-2
MoD grants contract to each prime contractors, namely MHI (system integration, in sky blue), GE (engine importation, in green), Mitsubishi Electric (radar and EW, in green). The sub component suppliers (in green) then supply the components to MHI without further cooperation.
P-1
MoD grants contract to each prime contractors, namely MHI (system integration, in sky blue), IHI (engine, in green), Fujitsu (photonic radar, in green), Mitsubishi Electric (self protection system, in green). The sub component suppliers (in green) then supply the components to MHI without further cooperation.
X-2
MoD grants contract to prime contractor, MHI (system integration, in sky blue), who then contracts sub component supplier (selected by the MoD), IHI (engine, in green). IHI provides technical support to MHI for the integration of the engine to the airframe.
(supplementary background information) future fighter related development program until now
"investment until now : ¥ 227.7 billion (around $ 2.16 billion in today's exchange rate)"
The content in the top most row specifies "item", "expenses" and "years of development"
● [system integration] (integration concept) (total expense : ¥8.9 billion) (from here on I will skip the translation of expenses and development timeline because its obvious what it means)
- future fighter conceptualisation
- technical feasibility study
- (basically the same to one above)
● [aircraft] (integration technology) (airframe components) (total expense : ¥93.3 billion)
- ATD-X
- aerodynamic studies regarding IWB and weapons release
- IWB low observability studies
- stealth intake studies
- studies regarding the weight reduction of airframe structure
- electric actuator studies (that alike of PBW electric hydrostatic actuators used in F-35)
- heat exchange system of smaller size for (incomprehensible)
- remotely controlled loyal wingman
- examination of stealth characteristics
● [engine] (integration technology) (engine components) (total expense : ¥51 billion)
- critical components regarding next generation engine (guess it's about technology for next generation engines in general)
- components regarding engines for fighter jet (AB and operation under supersonic, high g-load, high AOA environment?)
- engine system for fighter jet (maybe something like FADEC and integration to flight control like control via AI or such)
- improving the possibility of application (have no idea what this could mean)
- thrust vectoring nozel
● [avionics] (integration technology) (mission system components) (total expense : ¥74.5 billion)
- advanced integrated sensor suite
- studies regarding high resolution IR image
- simulation of advanced RF self defense (simulation of EW?)
- future missile warning technology (one I've posted above)
- next generation data link with higher speed and secuirty
- radome for stealth fighter (FSS probably)
- mission system integration for fighter jet
- next generation IR sensors
- integrated fire control for fighter jet
(supplementary background information) accumulation and advancement of fighter jet related technologies in Japan
"ATLA has cooperated with domestic defense industry to develop, test and demonstrate various technologies through ATD-X program (X-2), as shown below."
clockwise, starting from the top-left quadrant :
"Advanced integrated sensor system (22nd ~ 30th year of Heisei [2010 ~ 2018])"
"testing of a radar that uses state of the art MMIC"
"manufactured by : MHI, Toshiba, Fujitsu"
"Fighter jet engine (22nd year of Heisei ~ 2nd year of Reiwa [2010 ~ 2020])"
"demonstration of high-power and slim engine that incorporates highest levels of heat resistant materials and coating technology"
"manufactured by : IHI"
"Incorporating stealth technology to weapon release system (25th ~ 30th year of Heisei)"
"demonstration of technologies for faster release of missiles in the IWB"
"manufactured by : MHI"
"Technologies to achieve airframe with lighter weight (26th year of Heisei ~ 3rd year of Reiwa)"
"demonstration of technologies that enable the adhesion of composite materials without the use of steel (i.e. bolts and nuts) to realise lighter airframe"
"manufactured by : MHI"