"I made a Chouseisan and I want to send it to my LINE group." "Where in LINE do I even create one?" These are the two most-asked questions about Chouseisan, and the answer to both is simpler than people expect: there is no integration — you paste the URL into the chat like any other message.
In 2026 there is a second half to that answer, though. LINE now has date coordination built into chats, and a calendar on top of it. This article walks through sharing a Chouseisan link in LINE, then covers when you can skip Chouseisan entirely. Specifications reflect official documentation as of August 2026.
The short answer
There is no Chouseisan–LINE integration; you share it by pasting the URL into a chat. But LINE chats now include [＋] → [日程調整] natively, which lists candidate dates and collects ◯/△/× exactly as Chouseisan does. If everyone in the group is on LINE, you don't need to open Chouseisan at all.
Contents
For the wider picture on choosing a scheduling tool, see our resources for solo professionals and small teams.
Sharing a Chouseisan link in LINE
There is no official integration between the two. Chouseisan is a tool that hands you a URL — its own site describes it as an attendance-table tool where you "just send the URL to members" to run attendance checks and date coordination (source: Chouseisan official site). Sharing it in LINE means pasting that URL as a message.
- In Chouseisan, enter an event name and your candidate dates to build the table
- Copy the URL shown after it is created
- Open your LINE chat, paste the URL into the message box, send
- Participants open it, type their name, and mark ◯ or × against each date
The official site describes creation as "2 steps" and "done in 30 seconds". Posting it to a group chat means everyone sees the same table, so the organiser never has to tally responses by hand. One caution: anyone with the URL can open and answer it. Links get forwarded out of chats, so take care with gatherings that include people from outside your circle.
Do you need an account? Is there an app?
Two questions that always come up alongside the first. No login is required. The site states plainly that events are created without signing in, so you can build and share a table with no account at all. The same applies to participants — they open the URL and enter a name.
If you are hunting for a dedicated app, you generally don't need one: the browser handles everything. Opening the URL from a LINE chat launches the browser directly, so nobody has to install anything. Not making people create an account is Chouseisan's real strength — and, as below, it is one LINE's own feature shares.
The date coordination already inside LINE chats
This is the part that matters in 2026. LINE chats have date coordination built in, which removes the generate-a-URL-and-paste-it step entirely.
The steps (source: LINE official usage guide):
- Open a chat room and choose [＋] → [日程調整] (date coordination)
- Enter an event name and description
- Select multiple candidate dates
- Invite members and send it to the chat
Participants answer each date with ◯ (yes), △ (maybe) or × (no). Tallying is automatic, and the date with the highest participation is highlighted in green, so nobody counts anything. You can also see which friends have not replied yet.
Put plainly: the three-way ◯△× answer and the automatic tally exist in both. The only real difference is whether you leave the chat. Separately, a standalone service called LINEスケジュール also exists, reachable from Home > Services, where you create an event and share it with contacts directly.
LINE Calendar, added in 2026
In 2026 LY Corporation added LINE Calendar. It was announced on 26 February 2026, shipped inside LINE in March 2026, and arrived as a standalone app in July 2026, renamed from Yahoo! Calendar (source: LY Corporation news release).
Three parts of it matter for scheduling:
- Shared calendars — one schedule a group can hold together
- Attendance confirmation — attending or not attending, per event
- Automatic reminders — notifications one hour and one day before
The third quietly matters most. Neither Chouseisan nor LINE's date coordination reminds anyone once the date is settled. The classic failure — everyone agrees, then someone forgets on the day — is only fixed by a reminder, and that arrived as standard in 2026.
Which one to use
| Situation | Use | Why |
|---|---|---|
| Everyone is connected on LINE | LINE's [＋] → [日程調整] | No URL to generate or paste; same tally and highlighting |
| Some people don't use LINE | Chouseisan | Anyone who can open a URL can answer — no account needed |
| You're sending it by email or work chat | Chouseisan | LINE's feature cannot leave the chat |
| You don't want it forgotten afterwards | LINE Calendar | Automatic reminders 1 hour and 1 day before (since March 2026) |
| You coordinate with the same people repeatedly | A booking page | Removes the proposing-dates step altogether |
For the first three rows there is little between them — on the one thing that matters most, not forcing participants to register, both are already good. The last two rows are where it changes.
For work bookings, neither is enough
Everything above is about matching availability across a group. Booking work time inverts the problem: the reference calendar exists only on your side, and the other person simply picks from what's open. Neither Chouseisan nor LINE is built for that.
| What happens | Polling (Chouseisan / LINE) | A booking page |
|---|---|---|
| Your availability | Typed in by hand, then copied back after | Read from your calendar; only open slots shown |
| After it's confirmed | Sent manually, or forgotten | Sent automatically the day before and shortly before |
| Who can answer | Anyone with the URL | A one-to-one page issued per person |
| Paid appointments | Collected separately somehow | Card payment at booking, or invoiced after |
If you propose candidate dates several times a month, removing that step is faster than doing it well. The threshold for moving off free tools is covered in our article on free Chouseisan-like tools, and coordination involving three or more people in scheduling with multiple people.
SailLab
SailLab is a Japan-built booking system combining booking pages, calendar sync, automated reminders and upfront payment. It assumes the other party is choosing from your open slots rather than everyone proposing dates.
- Two-way calendar sync: reads existing Google and Outlook events and shows only genuinely open slots
- Automated reminders: configurable timing and frequency
- Service menus and staff selection: options differing in content, duration and price on one page
- Upfront payment: card payment completed at booking via Stripe
| Plan | Monthly (excl. tax) | Main features |
|---|---|---|
| Free | ¥0 | 1-on-1 bookings, one link, calendar sync, automated reminders |
| Light | ¥1,000 monthly / ¥800 annual | Unlimited links, branding, capacity-based events |
| Standard | ¥1,500 monthly / ¥1,200 annual | Service menus, staff selection, Stripe payments |
| Professional | ¥2,800 monthly / ¥2,240 annual | Everything in Standard, 0% platform commission |
The platform commission on collected payments is 3% on Standard and 0% on Professional, with Stripe's own processing fee on top in both cases (as of August 2026; see the pricing page).
For a drinking party or a club outing you do not need a booking system. If all you want is to propose some dates and collect ○ / △ / ×, SailLab has a scheduling poll that works without signing up — free, up to 5 answers, kept for a year. And if everyone is already connected on LINE, the in-chat scheduling covered above is fewer steps than any of this. For the browser version of Chouseisan itself, see making a Chouseisan poll, and what comes after.
Summary: open the [＋] in your chat first
Sharing a Chouseisan link in LINE is just pasting the URL into a chat. There is no integration, and no login is needed.
But in 2026 the faster move is usually to open [＋] → [日程調整] in the chat first. Listing candidate dates, collecting ◯/△/×, and highlighting the most popular day all happen inside LINE. Reach for a Chouseisan URL when someone in the group isn't on LINE.
If you are coordinating with the same people several times a month, there is a way to remove the proposing step entirely. A free SailLab account gets one booking page live in a few minutes, with no credit card required.
Ken Morimoto ／ SailLab Editorial
Writes for SailLab Editorial on running bookings and scheduling with the tools already on hand — Google Calendar, Google Forms, Excel, Teams — and where each one stops.
Automate your booking flow with SailLab
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