Show HN: Hanaco Weather – A poetic weather SNS from the OS Yamato project

github.com

18 points by tsuyoshi_k a day ago

hanaco Weather is a minimalist social network where users post short, emotional weather thoughts and connect with others experiencing the same weather.

No likes or followers (for now) — just gentle presence.

Built entirely by a solo engineer, including the custom operating system it runs on: OS Yamato.

What is OS Yamato?

OS Yamato is a poetic, ephemerality-first operating system designed to let digital memories bloom and fade, like flowers in the wind.

Features include:

Diaries that bloom like seasonal flowers — and wither if forgotten

Photos and videos that quietly disappear unless viewed again

Chat with ambient seasonal effects and no pressure

A soft, nature-inspired calendar with reusable schedule templates

Wind Messages — time-delayed letters that arrive months later

A 3D globe to see fleeting connections blossom around the world

Each app within OS Yamato reflects a different way of embracing impermanence in the digital world.

Learn more about the concept and philosophy: [YouTube – Write a diary, and a flower will bloom](https://youtu.be/JrqwU_N5WBA?si=kZQAadNdBGipk6gz)

Try Hanaco Weather now: https://hanaco875.com

#ShowHN #HanacoWeather #OSYamato #solodev #minimalism #digitalpoetry #webapp #ephemeral

tsuyoshi_k - 21 hours ago

General reply to all (HN):

Thanks so much to everyone who’s checked out OS Yamato or Hanaco Weather so far!

I’d love to hear what you think after trying it out — what felt surprising, what worked well (or not), or just how it made you feel. Feedback, impressions, even short thoughts are all super welcome

The idea behind OS Yamato is to explore a calmer, more poetic way of interacting with data. If that resonates with you, I’d be thrilled to hear your experience.

→ https://hanaco875.com (sign up with just an email)

tsuyoshi_k - a day ago

Thanks for checking it out! I’m always happy to answer any questions or feedback — feel free to comment anytime.

(Also open to ideas or collaborations — you can find me on GitHub or Twitter if that’s easier!)

— Tsuyoshi