They are the "Combat Ration Type I" of a plastic pack.
The existing Type I is canned food.
The packaging design of a new Type I and Type II is very alike.
However, they have the following differences.
Type I : Parachute drop is OK and a best-before date is three years.
Type II : Parachute drop is NG and a best-before date is one year.
They mainly have a difference in the package of rice.
A new Type I has 20 menus.
The details are in the site of the Japanese Ministry of Defense.
http://www.mod.go.jp/epco/supply/kouji/ ... ai61go.pdf
1 鮭味付け
2 さんまピリカラ
3 筑前煮
4 大型乾パン
5 かつおカレー煮
6 さばトマト煮
7 タコライス
8 やきとり
9 鶏肉と大豆煮
10 スタミナ丼
11 豚肉と里芋煮
12 すき焼きハンバーグ
13 鶏肉とひじき煮
14 かも肉じゃが
15 煮込みハンバーグ
16 ポークカレー
17 ポーク・ローストチキン
18 フランクフルト
19 麻婆豆腐
20 豚肉しょうが焼き