How to read Dosetsu Board

What are concurrent viewers?

Concurrent viewers are the number of people watching a YouTube live stream at a given moment — the "watching now" number YouTube shows while a stream is live. It disappears once the stream ends.

View counts add up everyone who watched, including the VOD later. Concurrent viewers only count who showed up live, so the number reflects how many fans were there in real time. Channels whose audience mostly watches VODs, or whose fans live in other time zones, can look smaller live than their popularity suggests.

Dosetsu Board records concurrent viewers every minute so you can look back after a stream ends.

How the numbers are recorded

The list of live VTuber streams and their viewer counts come from the Holodex API every minute. Channels and streams Holodex doesn't know about are not recorded.

English streams are recorded separately from Japanese ones (detected from the title and channel name). On the English pages, days are split by US Pacific Time.

Because values are taken once a minute, a spike shorter than a minute may be missed. YouTube sometimes reports a sudden 0 or a jump; the record keeps the value as it was reported. Gaps where a reading failed are bridged between the surrounding values.

• Peak: the highest concurrent viewer count recorded during the stream
• Average: the mean of the per-minute readings from start to end
• Duration: from the actual start time to the end (or the last time the stream was seen live)
• Subscribers: YouTube subscriber counts fetched from Holodex every 12 hours. YouTube rounds them to three significant digits, so daily changes can show as zero

How rankings work

Daily, weekly and monthly rankings use the highest viewer count within that period.

A stream that crosses midnight is ranked on each day by its peak within that day. Weekly rankings run Monday to Sunday and monthly rankings cover the calendar month. Channel rankings use each channel's best stream in the period, with the number of streams, average and total stream time alongside.

The hourly view shows the top streams by their peak within each hour, so a long stream can appear in several hours.

Personal bests

All-time records list each channel's best peak since recording started in 2026. Streams under 30 minutes are excluded because announcements and restarted streams can skew them. Streams from before recording started are not included, so this is not necessarily the channel's true all-time high on YouTube.

Reading the viewer chart

• Rising from the start: the most common shape, as people arrive from notifications and social media. The peak usually comes mid-stream
• Peak right at the start: typical of big announcements or streams many fans were waiting for
• A sudden spike: a tournament final, a big moment in a game, a popular song or a guest joining. Look up that time in the VOD to find the moment
• A peak at the end: streams that save an announcement for the end, or long streams where viewers come back for the finale

The ratio of average to peak is a useful hint too: 80% or more means most viewers stayed for the whole stream, while under 50% suggests a short spike. The "What the data shows" sections on stream, channel, weekly and monthly pages calculate these comparisons from the records automatically.

Things to keep in mind

• In collabs, the same fans move between participants' streams, so adding up everyone's viewers overcounts the real audience
• Watch-alongs of tournaments and events split the audience with the main broadcast and often show lower numbers
• Members-only streams are limited to members, so compare them separately from public streams
• Time of day matters a lot; evening streams tend to draw more viewers than weekday afternoons
• These are unofficial records and may differ from numbers announced by streamers or agencies

FAQ

How often are the numbers updated?

Live viewer counts are fetched every minute and the page refreshes automatically. Subscriber counts are refreshed every 12 hours and schedules every 10 minutes.

A stream I'm looking for isn't listed.

Channels not registered on Holodex, or streams Holodex hasn't picked up, are not recorded. Streams detected as Japanese appear on the Japanese pages instead.

How far back can I look?

Per-stream charts and daily records are kept for 90 days. Each channel's personal best is kept permanently.