There isn't really that much to see in the museum, there a video of them showing his life, photos and stuff and the history of of instant noodles in post war Japan. There is that big room (too big to fit in my camera in a single phot), showing all the flavours they made. There is a life size mock up of his workshop with fake smoke coming out of equipment etc.
The absolute best thing is you get a chance to make your own flavour on the top floor, you need to book a time slot though, I had to go back to do it as I turned up in the morning to see the museum but the noodle making slot for me wasn't until like 5pm. You get to pick the ingredients, flavour and they would seal it for you. I made a double meat (chicken and beef), curry flavour. Before this you get to draw and paint the cup. So it's all shrink wrapped with your design on it.
There is also a gift shop and a balcony, I think there is a little cafe too.