Kate ≐

https://katebtc.substack.com/

I 🧡 bitcoin as 🌎🍀🕊ideas & money.

Public Key

npub1j958wftyuekq0fmk503gfxcz6xs2ez98lrnzzcqv23ynegx7fr4q2aem40

NIP-05 Address

Profile Code

nprofile1qqsfz6rhy4jwvmq85am28c5ynvpdrg9v3znl3e3pvqx9gjfu5r0y36spz3mhxue69uhhyetvv9ujuerpd46hxtnfduqs6amnwvaz7tmwdaejumr0dsg7gz7p

Publishing to

relay.damus.io

nos.lol

Author Public Key

npub1j958wftyuekq0fmk503gfxcz6xs2ez98lrnzzcqv23ynegx7fr4q2aem40

Show more details

Last Notes

2026-03-25 17:26:34 UTC

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Perfect! Thank you 😊

2026-03-25 06:12:39 UTC

Hi @npub17cy…4ml3 !
I’m planning to teach MFB “Introduction to Bitcoin” course in Japanese.
I have translated the intro slides now and wonder if I could share it with your team :) Who may I contact about this?

2026-01-03 16:13:31 UTC

富士山を見に行った1日目と2日目🙂
https://image.nostr.build/8dccc3f622a6636febda493ccc13ee411b40981d1b3e332f53390d742110545d.jpg
https://image.nostr.build/a964688f8322020bb180e0fec040579e5dad063089eba91ef532ab2a6d83c16a.jpg

2026-01-03 15:51:37 UTC

アマゾンで売り切れかもだけど、この本はすぐ読めて面白かったです
https://www.amazon.co.jp/dp/4910467149

2026-01-03 15:48:28 UTC

長い滞在は12年ぶりなので、日本の日常が楽しい😊
https://image.nostr.build/d82a58acaa15713107a4636816edec3624e7adb6df4d8a357065fd2b0306a315.jpg
https://image.nostr.build/6eeb2fa8e58280f446da8d76ded8f8dd3bc205878250daa531cbe417570bffe1.jpg
https://image.nostr.build/6be4897962c58c3777f28ab31e41de6e41970a3d9db97b1c0aea148f8c349958.jpg
https://image.nostr.build/357a74200af37efceaeaf5966bf13d83f6b97eedbd2da4b6ddb6a6f8222b4590.jpg

2025-12-03 12:06:53 UTC

12月16日（火）12〜15時に東京ビットコインベースにて、ランチミートアップを開催します！平日ですが、時間が自由な方、どうぞお気軽にご参加ください🧡 BitcoinOGの参加もあり、楽しい会になりそうです。#ビットコイン
https://luma.com/9uqvegba

2025-11-13 00:38:40 UTC

Earthquakes have increased recently in northeastern Japan. If visiting Tokyo or northern Japan in mid-to-late November, be aware of possible earthquakes and know what to do in an emergency, just in case. Hope nothing serious happens!
https://x.com/newearthquake

2025-11-12 01:57:14 UTC

ブログ記事を投稿しました！
日本でビットコイン開発や業界に興味ある方はぜひチェックを🫶
ビットコイン特化の国際テックカンファレンス: BUIDL@Tokyo Bitcoin Base ⚡️(11月23日）
https://spotlight.soy/detail?article_id=its4kpgbd

2025-11-10 06:50:01 UTC

11月23日にビットコインの技術系カンファレンス、BUIDL@Tokyo Bitcoin Base: ジェネシスブロックが開催されます。私もイベントのお手伝いで会場に行きます😄
チケット発売中🎫(70000 sats)。ビットコインの最先端、特に技術面に興味ある方はぜひご参加ください！
東京で、つながる、語る、つくる — ビットコインの未来
https://btc-jpn.com/buidl

2025-10-24 03:05:18 UTC

ここにはトレードする人はあまりいないと思いますが、注意喚起としてブログ記事を投稿しました！
Uptober? Downtober?📈📉暗号資産トレードのリスク
https://katebtc.substack.com/p/uptober-downtober

2025-10-22 05:21:58 UTC

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It’s likely raining here tomorrow, so I’d miss it🥲

2025-10-22 00:55:19 UTC

We might be able to see the comet tomorrow 👀
Comet Lemmon (C/2025 A6)🌠
- On October 22, it’s predicted to lie about 10° above the star Arcturus in the west-northwest sky around 7:30 p.m. local time.

2025-10-22 00:41:55 UTC

Lovely maple tree 😍
https://image.nostr.build/0d5cbe361c8dfb778e91c5eed1b078ddf9edbeae8aa7e11951b768bed855c912.jpg

2025-10-20 21:46:36 UTC

なぜ人は #ビットコインに夢中になるのか
ビットコインに心を動かされた10人のストーリーを紹介する記事を書きました。
よかったら読んでみてください😊
https://spotlight.soy/detail?article_id=cle1q4u0k

2025-10-09 05:03:12 UTC

子を少しでも運動させるため夜の散歩行ったら、いい感じの写真撮れた😌
https://image.nostr.build/a128b42e8e380587ce29e85cadb282a307639620962673f868dd4d8acadb40f0.jpg

2025-10-09 01:56:44 UTC

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Yes, it’s a great place 🥰

2025-10-09 01:15:12 UTC

I don’t have a boat but enjoy sipping coffee☕️ at the marina☺️
https://image.nostr.build/54dc65e59e16a4e996684fa3d89202237c6a87aaad0206246d5105c865d85fbe.jpg

2025-10-06 19:16:14 UTC

So nice to go to the beach on Monday morning 🥰☕️
https://image.nostr.build/b779bf15811a3c2a4bb303a7509e7827543d564e4a513a9445086e4027f1cbfe.jpg

2025-10-05 19:31:19 UTC

Lovely ocean view ☀️
https://image.nostr.build/5f00d6357f20cc15705404dd5a2fcbdcb707ab2097a8d69fdf072376366b769d.jpg

2025-09-08 06:53:48 UTC

Satori Coin is a serious collector’s item☺️
https://x.com/satoricoin/status/1960839230730723454

2025-09-08 06:49:47 UTC

Excellent proof of work🧡
https://x.com/satoricoin/status/1964776266558504980

2025-09-08 02:20:53 UTC

ブログ記事を投稿しました。
💸GENIUS ACTはドル延命の“天才的金融ハック”🔥
✅ビットコインとステーブルコインの違い
✅なぜステーブルコインが役立つのか
✅ GENIUS ACTは天才的な金融ハック
✅日本円ステーブルコインJPYC
✅経済への影響は？
https://open.substack.com/pub/katebtc/p/genius-act
#bitcoin #stablecoin

2025-09-05 03:38:47 UTC

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Thank you for your generous ⚡️

2025-09-05 01:12:18 UTC

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I listen to many Bitcoin podcasts, but this episode is truly a gem 💎😊

2025-09-04 21:58:35 UTC

I found an amazing podcast that touched my soul today💜 Thank you @npub1u4l…2gwh
If you support hypercoinization, I highly recommend watching it.
I’m opting out of the fiat workplace soon, with endless future possibilities😊
https://youtu.be/YiGfdfr-C-g

2025-08-24 23:07:47 UTC

Spam calls and SNS messages annoy billions of people🙄
Can someone invent a system to charge unknown callers/spammers a small fee using a digital wallet directly linked to a phone number?
It would be nice to earn sats automatically that way, for instance😂 Wouldn't it be cool if Zap⚡️ technology could prevent spam?
We need a real solution for spam…

2025-08-22 15:37:34 UTC

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I didn’t know about this guy until yesterday lol He showed up in a Japanese business channel 🫡 Bitcoin is the fix for many points he’s talking in the show! It’s such an irony 😂

2025-08-22 07:10:27 UTC

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Gary wants to address financial inequity, broken societies, family struggles, etc. which can be fixed by Bitcoin adoption. But sadly, he’s fiat mindset is so strong, preventing him from viewing Bitcoin in a healthy way lol

2025-08-22 06:53:41 UTC

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He’s a Bitcoin hater 😂

2025-08-22 06:52:38 UTC

I wish someone could orange-pill this rich man! I think he needs one "aha" moment to get it, right?
https://youtu.be/VlvoNgUi8EU

2025-08-18 21:55:25 UTC

😍
#note1nk8…qffu

2025-08-18 21:20:54 UTC

Fantastic to find a med team on #Nostr 💜
#note14at…7jkw

2025-08-18 18:42:06 UTC

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Bitcoin mining is a fascinating topic! I hope more people explore it.

2025-08-18 18:39:36 UTC

The dream of creating a perfect energy world - Leveraging Bitcoin Mining ⛏️
Security in Japan, Circular Economies, and Peaceful Societies.
https://youtu.be/1BGFBAYWnzU

2025-08-18 18:22:45 UTC

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Thanks @npub1xts…kk5s. If there’s a chance, I could be a volunteer in workshop ☺️

2025-08-18 18:20:13 UTC

Bitcoin mining, combined with other technologies, could address some energy issues, grid balancing, and environmental impacts of human activities🌳
Kenji Tateiwa, President of Agile Energy, shares innovative ideas on the podcast (English)👇
Notably, Tateiwa’s background is in nuclear engineering.
https://youtu.be/qHL3ytRBTMM

2025-08-18 06:58:29 UTC

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Indeed! Great to meet you in person 🧡

2025-08-17 21:30:02 UTC

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Hi!

2025-08-17 21:14:18 UTC

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Hi ☺️

2025-08-17 21:01:30 UTC

Attending #LearningBitcoin in #Vancouver 😀
https://image.nostr.build/894033ddf0c16caec1af8ce5a53b13ddbe9c7070d1c2e39372b3bddffe7abc32.jpg

2025-08-04 22:09:13 UTC

7月の東京訪問や最近のビットコインニュースなど投稿しました📝
TBBと貨幣博物館に行ってきました！
ビットコインから知る世界（17）
https://open.substack.com/pub/katebtc/p/tbb

2025-08-03 14:39:14 UTC

東京の豪徳寺。今や観光名所になってる☺️
https://image.nostr.build/7a8bfee224438120c0f89eb17b6b84abd7c400cd536ad4ab8991aa9a9a9ab935.jpg

2025-08-03 14:35:21 UTC

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あわゆきさん @npub1e4q…0p76 の元祖ZapTを注文しました😄

2025-08-03 13:49:14 UTC

Gm🌞
https://image.nostr.build/92531a8cd35afec3a32e880fc4e28fed0d701268a24d76bab3157c3a4fe019a0.jpg

2025-07-12 23:27:56 UTC

My first visit to Tokyo Bitcoin Base :) Met a group of wonderful Bitcoiners!
https://image.nostr.build/31cadaf84e35356ffbdde345076f055ee041cb5ba8c9fd174f169562c1781663.jpg

2025-06-30 23:31:34 UTC

久々にブログ記事ポストしました！読んでいただけたら嬉しいです。
ビットコインから知る世界（１６）
Z世代にビットコインが重要なわけ／価格動向の謎
https://katebtc.substack.com/p/z

2025-05-01 05:09:09 UTC

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ビットコインそのものよりメタプラ株／会社のファンがけっこういるイメージですね。CEOと写真撮ったりとかするのも人気みたいでした。(情報源はXですが🫡)

2025-05-01 01:55:26 UTC

久しぶりにブログ投稿しました！今回はTBBオープン、メタプラ、ソフトバンクを取り上げました。
ビットコインから知る世界（１５）
日本でもビットコイン普及が加速か 🚀
https://katebtc.substack.com/p/581

2025-04-20 19:33:52 UTC

Great to hear about an exciting pilot project to reduce methane gas emission in a remote area of Hokkaido🇯🇵🧡
Tateiwa Kenji | Antifragile Energy Security in Japan, Circular Economies... youtu.be/1BGFBAYWnzU

2025-04-17 14:15:24 UTC

Gm. I got up early this morning and saw the beautiful sunrise 🧡
https://image.nostr.build/978022293a9afb17adcafd66a43666d1ec772b7cfb07957054bcf1521e583d13.jpg

2025-04-13 17:48:46 UTC

Gm☀️
https://image.nostr.build/5054df9f7d39cf11050be7148acd9254e205e89ffcafbaf0735c1be30da8ba0a.jpg

2025-04-13 04:45:25 UTC

A happy full moon 🌕🧡
https://image.nostr.build/dfa27e9f09336a031c56950a1e3b07f77bdabcb9b50215471b67b8f4b5c7f96a.jpg

2025-02-25 04:30:37 UTC

今日2/25は四谷にできたTBBでミートアップ開催ですね♪
そういえば米国政府の持っている(はずの)ビットコインの記録が行方不明という噂はどうなってるんだろう🤔

2025-02-25 04:27:53 UTC

久しぶりに書きました。トランプ大統領の影響、Free Ross、テザー、Bybitの件など。
ビットコインから知る世界（13）
Kateのビットコインよもやま話～変革の渦の中
https://katebtc.substack.com/p/13

2025-01-25 17:46:52 UTC

Gm ☕️ https://image.nostr.build/3786f196a6691df1365207b0f53c990651c86a590ee9749e65d433cb2b8fbf0e.jpg

2025-01-20 01:50:54 UTC

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Yes!

2025-01-20 01:11:57 UTC

I want a new phone with 4k camera! https://image.nostr.build/37b51a3b51f5c7ea3450d88e73b88885b9960d349fdaf51e9afb6cf211aac780.jpg

2025-01-20 00:26:44 UTC

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Welcome to Nostr 🎉

2025-01-18 19:02:21 UTC

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Love that 😆

2025-01-18 18:52:13 UTC

Gm🧡 We can ignore noise and be happy 😊 https://image.nostr.build/441fd4ba5f40eedeb974c8f2b4780c4115a8ff00f2f0857bc5d928ed05846144.jpg

2025-01-13 01:17:03 UTC

Almost full moon 🌝 https://image.nostr.build/219944d4c3de9ea22301432d5196d29d562a60f469a5df93a6494f4700117603.jpg

2025-01-11 17:27:18 UTC

Good morning 🙂 https://image.nostr.build/357e2a4e84ed7274a45674478865b4219c3707951f39bcbb4647343615a6473c.jpg

2025-01-11 17:26:10 UTC

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Thanks for sharing the beautiful story 💜

2025-01-01 20:25:10 UTC

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Happy Birthday 🥳💜

2025-01-01 20:11:16 UTC

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You too 🧡

2025-01-01 20:05:54 UTC

Beautiful sunrise on the 1st day of 2025 🥰 It will be an amazing & exciting year!
I continue sharing my (limited) knowledge of #bitcoin with non-coiners and new coiners and #nostr with freedom lovers!
I will be patient, go with the flow, until my dreams come true.
As many excellent leaders in the space say…
Bitcoin is the way to make better changes for everyone, because money is the 1st layer of the social infrastructure. The current broken fiat system has to be fixed first to bring back humanity and love to this beautiful & abundant planet.
Each of us is a change agent, light worker, to create a happy, healthy, and collaborative community (including family & home)✨
Again, BTC = be the change!
HNY to all🧡 https://image.nostr.build/4663798877de6053480d7a1ad077608869a5ed1a3ae4ca3626d3425a7350e1d8.jpg

2025-01-01 06:48:34 UTC

Happy New Year 💜🎆😊
2025 will be a fantastic year 🚀🧡

2024-12-28 20:06:01 UTC

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Just went for a walk 🙂 https://image.nostr.build/18e7cc43d5322050a7a8b9ee81d41ef4901f3457f88960d2faac67525f95bbb0.jpg

2024-12-25 18:41:08 UTC

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Thanks for your kind comment :)

2024-12-25 17:40:00 UTC

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Pv 🧡

2024-12-25 17:16:57 UTC

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👏🧡

2024-12-25 17:14:37 UTC

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Cheers 🥂🧡🎄

2024-12-25 17:09:49 UTC

Merry Christmas to you & your family🎄hope you all have a happy and peaceful day ✨
I still believe in the importance of self-custody of Bitcoin, even though i had made a bad decision and moved my coins at my will wrongly, ended up a hard lesson ⬇️ One day my lost coins will circulate back to me somehow 🧡 I choose to be optimistic and happy😊
I hope our world becomes healthier with the hard money, and honest hard working people will be rewarded more as they deserve! #note1nu3…r05t

2024-12-19 19:57:55 UTC

Yay, finally we received a box of Umbrel server and my son started playing with it. Hope he can manage it…

2024-12-19 17:10:05 UTC

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It’s a fun time. I’m good ☺️ thanks 🙏

2024-12-19 16:26:27 UTC

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Yes, I am already back on track🧡

2024-12-19 16:25:47 UTC

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Life is fun and I take it as a great learning experience 🙂

2024-12-19 16:24:27 UTC

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Thank you for your comments! Yes it’s been reported officially, with more details.
I’m in zen mode 🧘🏻‍♀️ and feeling calm. There’s many lessons I’m learning from this experience, especially about my vulnerabilities, and power of belief, imagination, and deception!
Love and hope can be exploited by bad actors sometimes very easily. Ordinary people in struggle are more likely to become victims, like myself.
But I will never stop believing in good side of us ☺️🙏

2024-12-19 16:13:10 UTC

@npub1rxy…hnp8 @npub1s05…eyhe @npub1sg6…f63m @npub1j8y…vrvg @npub132e…zmdh @npub1cn4…3vle @npub1tjy…0e9k @npub14hn…a32x @npub1tjk…s9w3
I believe Bitcoin can fix a lot of problems. But some people like myself make bad decisions, mistakes in weird moments and lose precious bitcoins. It’s still in a sense Wild West here. Bitcoin is sometimes too easy to send out. Hope AI tech combined with Bitcoin will reduce costly human errors in users in the near future 🧡🙏
Thank you all leading Bitcoin & Freedom tech to build a better & brighter future! Hope this amazing technology will be safer for more users. Huge gratitude for your incredible work in the space 🙏 Happy Holidays 🎄 #note1nu3…r05t

2024-12-19 15:33:58 UTC

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Please scroll down the blog page to view the English article 🙏

2024-12-19 15:30:03 UTC

Gm wonderful freedom tech people 💜
I’ve got a story about being “PIG BUTCHERED” to share with you. It’s my real experience happened since this November and am still dealing it with now.
⚠️I am about to lose $150k worth of bitcoin in online scam on Christmas Day🤦‍♀️🎄
Bitcoin is fine. It never betrays us. It doesn’t disappoint us. The biggest security holes are human errors. I betrayed myself, breaching my investment philosophy. I hope this story to be shared far and wide for educational purpose.
The exchange site has changed its URL three times in a month. They try to charge me a hefty withdrawal fee. Hope this scammy operation will be busted soon.
https://katebtc.substack.com/p/10

2024-12-15 18:47:50 UTC

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@npub19vv…t562 thanks for reposting 🥰

2024-12-15 17:44:10 UTC

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Thank you for your fantastic presentation in Vancouver 🧡

2024-12-15 17:34:55 UTC

The same beach this morning 🤗 https://image.nostr.build/8849b43a823002604f28367dce05529628f3e37d0c328ac01a696c33ab4d5c88.jpg #note1w2x…6907

2024-12-14 23:24:17 UTC

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Not for me!!

2024-12-14 19:52:46 UTC

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I saw a young man who went into this cold water😂

2024-12-14 19:05:02 UTC

Stormy beach this morning 🌊 https://image.nostr.build/02371835d70dd0999c6bd9b86898044799c47852647e47289110c63cf4526156.jpg

2024-11-27 14:00:08 UTC

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Thanks😆

2024-11-27 13:57:48 UTC

Gm💕 I’m waking up too early these days 🥱 https://image.nostr.build/4a4887e65a37056eded91ebdd48bdffc2aae4270271816255267ac62c29153b8.jpg

2024-11-01 04:45:44 UTC

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@npub1tqw…2jhh thanks for reposting 🧡

2024-11-01 04:28:26 UTC

めずらしくこっちにポストし忘れてました！もう11月ですね🍂
ビットコインから知る世界（7）
Kateのビットコインよもやま話～ビットコインマキシとは？
https://katebtc.substack.com/p/7

2024-11-01 04:23:32 UTC

今年はハロウィンらしいこと何もしなかった

2024-10-21 03:06:13 UTC

ビットコインから知る世界（6）
Kateのビットコインよもやま話～経済格差と戦争への道
今回は「反戦」についても触れています。
https://katebtc.substack.com/p/6

2024-10-14 16:21:29 UTC

Happy Thanksgiving 🍁🇨🇦 https://image.nostr.build/911b919c37b9d854d1eda0390d6346a28b51701f8780dc3a56e7de3373a1f6dc.jpg

2024-10-14 16:00:37 UTC

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Kenji’s long-term vision to use bitcoin mining for circular economy is amazing! (Mentioned near the end of the show) Thanks for this fantastic interview 🧡

2024-10-14 03:45:46 UTC

ちょっと時間が空いてしまいましたが、#BitcoinTokyo2024 を振り返ってみました！
今後さらに人同士のネットワークが広がるといいなと思いました🙂
https://open.substack.com/pub/katebtc/p/5

2024-10-12 05:26:06 UTC

昨夜うちの近くから見えたオーロラ、けっこうすごかった✨ https://image.nostr.build/4713421e678beedc85aa2ef2fb146ad2367df7c8d8baafedf948da24fdf9ec38.jpg https://image.nostr.build/114503dbb483bf9777526783d3704e3f0e0b3eba5d625aa02672126e1a686317.jpg

2024-09-24 07:00:09 UTC

Nostrasia Tokyo 2回目に参加できなかったのは残念でした！来年もあればぜひ。マグロ🍣付きイベントで😆

2024-09-15 18:57:04 UTC

#Bitcoin = BTC = Be The Change 🧡(by @Breedlove22)

2024-09-15 18:23:49 UTC

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Was mentioned by Robert Breedlove :)
https://youtu.be/BkApjTXBee4