I bought a few bags of 100g before (bought 2 - 3 times already). This time, I tried the 300g because it was cheaper. I don't know they are the same product or not? But I don't bother to email to ask because I don't know Japanese. I opened them last night. However, the package are different from the 100g. The 100g was vacuumed packaged, but this 300g were packed in 2 zipped bags. Honestly, my wife and I don't like this because we bought from overseas via Rakuten Global Express. We prefer vacuumed package more. I will buy the 100g in the future even it's more expensive. The package is important to us because we receive the products about 3-4 weeks after purchasing.