A very nice story and I'm really glad that you kept it all together as a living testament to one story in the US WW2 Pacific campaign. There is value in this way beyond money. I have a very similar story having inherited several Japanese WW2 flags, headbands, and an extremely ancient Wakizashi along with several other artifacts from my grandfather who was in the Marines and landed several islands including Iwo Jima. He actually came in on the second wave of soldier transport boats and fought through blood and guts and lived! He also witnessed the historic flag raising! I am the only one in my family of whom he told his battle stories. The stories of his friends and comrades whom have fallen. And I know he did this in trust because I would remember and honor him and his memories.
But all in all it is the story of the warriors, both Japanese and Allied and their testament that you hold. Please try and keep all these items intact and together as much as you can. And please make sure that whoever ends up with these artifacts know the history behind them.