I was in port in Sasebo walking back to the dock on a rainy evening and a random Japanese girl stopped her car and told me to get in, asked where I was going and drove me back to the pier so I didn't have to walk through the rain. I don't think she spoke a lick of English.
I fell asleep on a train outside Kyoto. I mean really fell asleep, I was exhausted from walking all day.
Woke up at the end of the line. Like, the actual end. The train was empty and stopped.
I panicked, grabbed my stuff, but then realized my phone wasn't in my pocket. It had fallen between the seat cushions.
I was digging around looking for it when the conductor came through. Older woman, very stern looking.
I tried to explain in terrible Japanese that I missed my stop and lost my phone. She held up one finger like "wait" and made a phone call.
Then she started searching with me. Found my phone wedged deep in the seat. Handed it to me, then checked my train pass to see where I was trying to go.
She walked me off the train, across the platform, and put me on the right train going back. Told the conductor on that train something in Japanese, and he nodded.
As my train pulled away she gave me this tiny smile and a wave.
The new conductor came by and said in English "Yamada-san called ahead. I will tell you your stop. Don't sleep."
He personally came and got me at my stop. Said "here is your station. No more sleeping on trains, okay?" Like a gentle scolding.
Two strangers went out of their way to get a confused tourist back on track. The first one even made sure the second one knew to watch out for me.