For honeymoons involving walking, hiking, or any other sort of strenuous pedestrian activity - you're going to want good, reliable shoes.
My impression from Japan is that everyone has cute shoes. Cute sandals, cute heels, cute boots - you name it. Well, except for the rampant Croc fascination. I don't know much about fashion, but the rubbery fashion statement really confuses me.
Anyway, I brought a pair of cute sandals with me, hoping to blend in with the locals. Did I wear them? Zen Zen! (Not at all.) Instead, I spent the entire duration of our trip in these "beauties":

Yes, old brown Rainbows so worn in there's a permanent shadow where my foot belongs. But they were comfortable - six years of tried and true comfortable. No blisters, no foot pain other than the dull ache of walking way-too-much - that equals no problem. Sure, they aren't cute and trendy, but they certainly allowed me to trek around happily. And Japan requires a lot of walking. Walking to train stations, walking to temples, up mountains to castles, walking in the middle of some seedy pachinko alley because someone didn't read the map correctly...

Just to give some perspective - on a typical work day I walk about 7,000 steps. Our longest walking day (according to my Pokewalker) in Japan was about 35,000 steps. A lot of walking.
So bring your most comfortable shoes, regardless of how they look! Your feet will thank you.
And finally - advice for those planning on international honeymoons: bring familiar medicine.
I really should have known better, especially after discussing how Sak gets sick anytime he travels. Luckily he staved off the illnesses until after the wedding, and I consider it a relatively good thing that he only had two vomit incidents in Japan. Better than everyday, right?
I came to Japan with a massive Hawaiian sunburn and a blister on my foot from a cute, non-Rainbow sandal. Nearing the end of our first honeymoon week, Sak developed a massive cold sore under his bottom two front teeth. He also made friends with a snot-infection and a cough. A little bit of dizziness, too - but that could have been from dehydration and severe heat. Now maybe it was my foreign blood, but mosquitoes decided they loved me, and I had more than ten bug bites on each leg before the end of the trip. It probably didn't help that we spent a lot of time around standing water in moats/ponds near castles and temples.


So, what did I have on me to remedy any of the above ailments?

Screw an out-of-town bag - we needed an out-of-country bag.
Several convenience and drug stores later, we ended up with the following:

Later we bought this, thinking they might be sore throat lozenges since Sak read the word "nodo" (throat) on it:


My point is - if you can't really read the language, and you can't really ask for help, and you don't have international health insurance and an English speaking doctor - bring your familiar medicine with you. I think Sak would have been better a lot sooner had we some good 'ole cold & cough syrup.
So in summary, reliable shoes and reliable medicine - go! Add it to the honeymoon pack list!