Analysis of information sources in references of the Wikipedia article "Metal Gear Solid: Portable Ops" in English language version.
Regarding other MGS4 connections, Kojima said about the PSP Metal Gear Solid Portable Ops, " If you change the Ops story, you have to change 4. If you change 4, it also becomes necessary to change Ops. Until Ops is finished, 4's story can't be finalized."
"『MG』シリーズは、ビッグボスの物語だ。劇中の時系列から言えば最初の二作にあたる『メタルギア ソリッド３』と『メタルギア ソリッド ポータブル・オプス』では堂々主人公、続くMSX2時代の『MG』と『MG2』では敵役"[“The "MG" series is the story of Big Boss. In terms of the chronological timeline, he was the protagonist in the first two games, "Metal Gear Solid 3" and "Metal Gear Solid Portable Ops," and the antagonist in the following two MSX2-era games, "MG" and "MG2.”]
1971: ビッグボスが「Fox」に対抗するため「Foxhound」部隊を設立.[Big Boss establishes “Foxhound” unit to oppose “Fox”.]
本作は『メタルギア』サーガ（本史）初の携帯ゲーム機プレイステーション・ポータブル用ソフトである。[This work is the first handheld game for the PlayStation Portable in the Metal Gear Saga (mainline series).]
(24:55): The official Metal Gear Solid storyline starts with Metal Gear 1, Metal Gear 2, [...] then we have Metal Gear Solid 1, 2, 3, 4, and then we also have Peace Walker. And those are the main games that comprise the official canon story. And PO is also in there, but it's not considered a main chapter. It happened, but the main ones will, [_] have the official canon [_] of these games. And then, of course, we have Raiden, coming up with Rising, which will also be considered canon. [...] That's the official stance.
Regarding other MGS4 connections, Kojima said about the PSP Metal Gear Solid Portable Ops, " If you change the Ops story, you have to change 4. If you change 4, it also becomes necessary to change Ops. Until Ops is finished, 4's story can't be finalized."
(24:55): The official Metal Gear Solid storyline starts with Metal Gear 1, Metal Gear 2, [...] then we have Metal Gear Solid 1, 2, 3, 4, and then we also have Peace Walker. And those are the main games that comprise the official canon story. And PO is also in there, but it's not considered a main chapter. It happened, but the main ones will, [_] have the official canon [_] of these games. And then, of course, we have Raiden, coming up with Rising, which will also be considered canon. [...] That's the official stance.
本作は『メタルギア』サーガ（本史）初の携帯ゲーム機プレイステーション・ポータブル用ソフトである。[This work is the first handheld game for the PlayStation Portable in the Metal Gear Saga (mainline series).]
{{cite web}}: CS1 maint: bot: original URL status unknown (link)MGS Peace Walker の原点。[MGS Peace Walker Origins.]