*'''Gain Air Superiority while Defending in a Land Base Air Raid (Hard)'''
*'''Gain Air Superiority while Defending in a Land Base Air Raid (Hard)'''
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**All LBAS should also not be damaged to 75% or below of their total health (混乱).
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'''Reach Node H''' (and possibly gain Air Superiority while Defending against a Land Base Air Raid)
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*The easiest way to do this is to send a single SS(V) to the western portion of the map.
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**Set all LBAS to interceptors/fighters on defense before the sortie.
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*The only node that may endanger your SS(V) is node B. Sparkling is recommended.
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**The rest of the nodes are submarine or air battle nodes.
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*The LBAS air raid should trigger during your submarine's passage towards Node H. Repeat until you fulfill the conditions listed above.
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'''Reach Node S'''
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*The shortcut that will be unlocked only helps you avoid one additional air battle node (node K; shortcut is from node J to node N), so bring a full fleet for a chipping run to the boss node.
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*As with later runs, you will need at least 4/6/8 Ozawa Fleet members for the shortest route to the boss.
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**[[Shoukaku]] does '''not''' count as an Ozawa Fleet member (see above for the full list of Ozawa Fleet ships).
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**See below for fleet composition recommendations.
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*Once you have reached node S (and assuming that you have cleared all other requirements), the shortcut will appear on the map.