- [Akari and Takaki kiss for the first time]
- Takaki Toono: And right then it felt like I finally understood where everything was, eternity, the heart , the soul. It was like I was sharing every experience I'd ever had in my past 13 years. And then, the next moment, I became unbearably sad. I didn't know what to do with these feeling. Her warmth, her soul. How was I supposed to treat them? That, I did not know. Then right then, I clearly understood that we would never be together. Our lives not yet fully realized, the vast expanse of time. They lay before us and there was nothing we could do. But then, all my worries, all my doubt, started melting away. All that was left were Akari's soft lips on mine.
- Takaki Toono: It must really be a lonelier journey than anyone could imagine. Cutting through absolute darkness, encountering nothing but the occasional hydrogen atom. Flying blindly into the abyss, believing therein lie the answers to the mysteries of the universe.
- [first lines]
- Akari Shinohara: Hey... They say it's five centimeters per second.
- Takaki Toono: What do you mean?
- Akari Shinohara: The speed at which the sakura blossom petals fall... Five centimeters per second.
- Takaki Toono: For the past few years, I've wanted to move on... to grasp onto something beyond my reach... what that is, I don't even know. All I've been able to do is go on working, not knowing where these obsessive thoughts come from. Then one day I realized that my heart was withering, and in it there was nothing but pain. Then one morning... I realized that my beliefs, that I once held so passionately, had completely disappeared. That was it, I couldn't take any more, so I quit my job.
- Kanae Sumida (segment "Cosmonaut"): When I get near Tono I get this tight sensation deep in my chest. He's so nice. Sometimes it makes me want to cry.
- Kanae Sumida (segment "Cosmonaut"): I began to understand why Tono seemed different from the others. At the same time, I came to a very clear realization that Tono was never looking at me. So that say, I didn't say anything to Tono. Tono is certainly nice... very nice indeed... but... Tono's always looking past me... at something far beyond. I guess my wishes to be with Tono will never come true. But still... but I still won't be able to stop loving him. Not today, not tomorrow, not ever. I fell asleep that night crying, the only thoughts in my head being of Tono...
- Takaki Toono: In just living my life, it's as though sadness piles up all around me. It's on my sheets, dried in the sun... the toothbrush in my bathroom... in the memory of my cell-phone...
- Takaki Toono: I didn't even mention the letter I lost. Because after we'd kissed... it seemed like the whole world had completely changed. I wanted so badly to be able to protect her. That was all I could think about, as I gazed absently out the window.
- Kanae Sumida (segment "Cosmonaut"): The more I see Tono, the more I love him. It's been scary... every day's been painful. But... every time I see him, I'm happy. And there was nothing I could do about it.
- Takaki Toono: It must really be... a lonelier journey than anyone could imagine. Cutting through absolute darkness... encountering nothing except the occasional stray hydrogen atom. Flying blindly into the abyss, believing therein lie the answers to the mysteries of the universe. And us... to that end, how far should we go? And how far van we go?
- Kanae Sumida (segment "Cosmonaut"): Desperately, reaching recklessly towards the sky... launching that massive object, in search of something almost overwhelmingly far off in the distance...
- Takaki Toono: When I read her letters, I always envisioned her alone. In the end, the train spent around two hours, motionless, in the middle of nowhere. Every minute seemed like an eternity. Time felt heavy with malice, as it slowly crept by. All I could do was grit me teeth and try to hold back my tears. Akari. Please... please... don't wait for me... if you'd just go back home...
- Takaki Toono: On that day... the day she called... Akari must've been so much more jittery and upset than me, yet I couldn't find the words to console her. I felt so ashamed of myself.