Free practice sitting

Flash anzan kentei 1st to 10th dan: into 3-digit numbers

Shodan keeps 1 kyu's count of 15 2-digit numbers but cuts the time to 10 seconds. At 2nd dan the numbers grow to 3 digits and the count restarts at 4, then climbs back to 15, and after that only the time falls: by 10th dan, 15 numbers flash in 3 seconds.

10 levels
2- and 3-digit numbers
Down to 0.2 s a number
10 questions a sitting

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Shodan (1st dan)15 × 2-digit, 10 s

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Choose a dan level and start. From 9th dan the numbers flash more than three times a second, so the sitting shows a flashing warning before those levels.

The level's own pace

Every number gets an equal, frame-timed share of the level's total time, with a blank beat before the next one.

Ten fresh sequences

Each sitting draws ten new sequences built to the level's digit width, count and carrying rules.

Marked with the bands

70 or more passes and 50 or 60 is a semi-pass. Every missed sequence is then shown beside its total.

The levels in this tier

This tier holds two turns in the ladder: the time cut at shodan, and the change to 3-digit numbers at 2nd dan, where the count starts again from a few numbers. The last three rows keep the count fixed and take time away.

1st to 10th dan: digits, numbers and times

Level	Digits	Numbers	Total time	Per number
Shodan (1st dan)	2	15	10 s	0.667 s
2nd dan	3	4	4 s	1 s
3rd dan	3	6	5 s	0.833 s
4th dan	3	8	6 s	0.75 s
5th dan	3	10	7 s	0.7 s
6th dan	3	12	8 s	0.667 s
7th dan	3	15	8 s	0.533 s
8th dan	3	15	6 s	0.4 s
9th dan	3	15	4.5 s	0.3 s
10th dan	3	15	3 s	0.2 s

The Flash Anzan Kentei Association publishes shodan, 2nd dan and 8th to 10th dan. The rows for 3rd to 7th dan are Kani practice settings, placed between the published levels on either side.

What these levels ask

Shodan (1st dan) is a speed step. It flashes the same 15 2-digit numbers as 1 kyu but in 10 seconds instead of 13, so each number gets 0.667 seconds.

2nd dan changes the numbers instead: 3 digits, only 4 of them, in 4 seconds. The hundreds rod joins the picture, and totals often reach four digits. Kani's settings for 3rd to 7th dan then add numbers level by level, up to 15 numbers in 8 seconds at 7th dan.

From 8th dan the count stays at 15 and only the time falls: 6 seconds at 8th dan, 4.5 at 9th dan and 3 at 10th dan, where each number is on screen for 200 milliseconds. From 9th dan that is faster than three numbers a second, which is why the sitting warns before it starts.

How Kani builds the numbers

At shodan every number has two digits; from 2nd dan every number has three, from 100 to 999. All dan levels add only, carrying is allowed, and the same number never flashes twice in a row.

With 3-digit numbers the totals run to four digits, so the running total spans four rods. The sample sequences below show how quickly that happens: a handful of 3-digit numbers already passes a thousand.

One sample sequence per level

One printed sequence per level, from the same engine and settings as the practice sitting. At dan level the printed row is a check on the arithmetic, not on speed: read it once, add as you go, then open the total.

Shodan (1st dan)15 × 2-digit, 10 s
841644696879922452535241719734
Show the total
Total:876
2nd dan4 × 3-digit, 4 s
460786604732
Show the total
Total:2,582
3rd dan6 × 3-digit, 5 s
117125917717833434
Show the total
Total:3,143
4th dan8 × 3-digit, 6 s
263590291918585236285942
Show the total
Total:4,110
5th dan10 × 3-digit, 7 s
923294259395941529784989214628
Show the total
Total:5,956
6th dan12 × 3-digit, 8 s
370479597958239405546938861559842421
Show the total
Total:7,215
7th dan15 × 3-digit, 8 s
443504391404159451889264412541588612627180677
Show the total
Total:7,142
8th dan15 × 3-digit, 6 s
251494445563913466179190508978215368288803141
Show the total
Total:6,802
9th dan15 × 3-digit, 4.5 s
888265633422851263840155887917671531327180679
Show the total
Total:8,509
10th dan15 × 3-digit, 3 s
404697555173948774226829190141659427857775154
Show the total
Total:7,809

How to practise

Treat shodan as a speed drill
If 1 kyu passes but shodan does not, the numbers are not the problem; the pace is. Alternate the two levels in one session so the faster rhythm stops feeling new.
Settle 3-digit numbers at 2nd dan
With only 4 numbers, 2nd dan is the place to get used to picturing three rods at once. Stay there until it passes every time before adding length.
Add length before cutting time
Through 3rd to 7th dan the count grows while the time grows more slowly. When sequences start to blur, go back a level: the fix is usually holding more numbers, not seeing them faster.
Rest your eyes between sittings
From 9th dan the flashes are quick. Take a short break between sittings, sit in steady light at a comfortable distance from the screen, and stop if anything feels uncomfortable.

Common questions

Why does the count drop at 2nd dan?

Because the numbers grow from 2 to 3 digits. The Flash Anzan Kentei Association's published ladder sets 2nd dan at 4 numbers in 4 seconds, and the count builds up again from there.

Which rows in this tier are the Flash Anzan Kentei Association's?

Shodan, 2nd dan and 8th to 10th dan match the Flash Anzan Kentei Association's published figures. 3rd to 7th dan are Kani practice settings, as the note under the table says.

Why is there a warning before 9th dan?

From 9th dan the numbers flash more than three times a second, a rate that can affect people with photosensitive epilepsy. The sitting shows a warning first so anyone at risk can stop.

Is Zenshuren's 10th dan the same as the Flash Anzan Kentei Association's?

Not necessarily. Zenshuren's flash anzan exam stops at 10th dan and does not publish digit widths or speeds, so the two cannot be compared level for level.

Sources

Kani Math is not affiliated with, endorsed by or licensed by the Japan Flash Anzan Kentei Association (Nihon Flash Anzan Kentei Kyokai), the League for Soroban Education of Japan (Zenshuren), the League of Japan Abacus Associations (Nishuren) or any other exam body. The levels on these pages are a practice ladder modelled on the one that association publishes: levels the table notes name as Kani practice settings carry Kani's own values, every sequence is generated by Kani, and a practice result is not a certification. Flash Anzan is a trademark of its owner. Exam details can change, so confirm them with whoever runs your sitting.