This was originally started as a land-based plane under the New High-Altitude Fighter Development Plan.<br>
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''This was originally started as a land-based plane under the New High-Altitude Fighter Development Plan.''<br>
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It then became the No.18 Prototype Armoured Fighter under the Navy's State-of-the-Art Next-Generation Mainstay Fighter Plan.<br>
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''It then became the No.18 Prototype Armoured Fighter under the Navy's State-of-the-Art Next-Generation Mainstay Fighter Plan.''<br>
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Due to the deteriorating situation, the plan was abandoned in favour of the relatively more realistic "Shiden Kai" development plan and "Reppuu" program.<br>
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''Due to the deteriorating situation, the plan was abandoned in favour of the relatively more realistic "[[Shiden Type 21 Shiden Kai|Shiden Kai]]" development plan and "[[Prototype Reppuu Late Model|Reppuu]]" program.''<br>
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This is a what-if trial mass-production model of that discontinued plan.
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''This is a what-if trial mass-production model of that discontinued plan.''