The bonus stats gained from improvement will vary depending on the type of equipment as well as the stat itself.
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*''For calculated improvment bonuses, please refer to the [[Improvement/Reference_Charts|Reference Charts]].''
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''For calculated improvment bonuses, please refer to the [[Improvement/Reference_Charts|Reference Charts]].''
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The combat {{Rations}} {{Equipment/Link|Combat Ration}} is the only equipment that does not gain any stats from improvement.
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*Improving it serves in theory to upgrade it into a {{Equipment/Link|Combat Ration (Special Onigiri)}}.
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*Since improving a ration up to +6★ cost '''0''' screw, it is possible to farm some screw by upgrading a ration once a day while doing quest [[Quests#F18|F18]].