You can put it in your checked baggage. Visit the IATA Travel Centre to obtain information about the country you’re visiting..

Even if it is something that you always have on hand or a gift to a … I bring fruit in my bag with me on (domestic) flights all the time. I do assume you have checked it's allowed into Japan. Depending on the country you are traveling from, prohibited objects can be different. Warning: Put it in a heavy duty ziplock bag, to contain the honey if the jar leaks or, worst case, gets broken. No one has ever even asked me about them, much less tell me not to bring them on. You can find a full list of what food items you can and cannot bring into New South Wales at: ... enjoy your first flight, you'll remember it for the rest of your life. You will then be able to take more. Japan's customs officials will check your luggage.

The Australian Department of Immigration and Border Protection manages the movement of goods and people across the Australian border, while each state and territory enforces their own local quarantine restrictions. This is to stop pests and diseases that can affect human, animal and plant health entering the UK. And pack it well so it doesn't get broken.

... Generally its fruit that is the biggest concern for domestic travel.

Something you want to be careful when traveling is your belongings. When you travel, each country has its own immigration and border protection requirements. There is some requirement for Honey to meet Japan's Food Sanitation Law for the product to be allowed in. It's a liquid.

There are rules about what food products, plants and plant products you can bring into the UK.

Bring it on with you, no. But if you are planning on buying things in Japan and coming back with luggage, taking it in a bag would be more sensible, that bag can be a backpack.