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Risako

Girls' name

From Japanese りさこ; literal meaning unconfirmed

Risako has been given to 31 babies in the U.S. since 1997. It was used fewer than 5 times in 2025, so it doesn't appear in the latest year's list — today it's a genuinely uncommon pick. Its peak year was 1997, with 8 recorded.

Babies named Risako, 2006

1 in 495,000

Risako over time, 1880–2025

Girls
0246818801900192019401960198020002020

Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Risako: meaning, origin, and history

From Japanese りさこ; literal meaning unconfirmed

Japanese

What Risako means

Risako is a given name.

Origin, language, and formation

Risako is used in English. Its origins include Japanese.

Risako comes through Japanese りさこ.

American usage and historical context

In the United States, 31 girls were recorded with the name Risako between 1997 and 2006. Its highest annual count was 8 in 1997; its best national rank was #10,578 in 1997.

Sources & methodologyReferences, data & attribution

Meaning, origin, and language notes draw on the references below.

American popularity figures use published Social Security Administration records for this exact spelling. Counts below five for a name, sex, and year are omitted.

Wiktionary material is available under CC BY-SA 4.0.

How common is Risako?

Risako had fewer than 5 recorded uses in 2025, so these figures use 2006, the last year it was published.

Among all babies, 2006
1 in 495,000
8 of 3,956,166 births
Among girls only
1 in 238,000
<0.01% of girls
Rank, 2006
Unranked
Fewer than 5 uses
Coin-flip room size
342,777 kids
Even odds of a second one

Where Risako sits on the popularity scale

Rarest published (5 a year)#1 — Olivia (13,544)

Chance at least one other child shares the name

If the other children were drawn at random from the 2006 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.

Class of 20Under 1%
Class of 30Under 1%
Grade of 100Under 1%
School of 500Under 1%

Put another way: gather 342,777 children born in 2006 and it's an even bet that one of them is another Risako. In a class of 30 the chance is Under 1%.

When Risakos were born

Half of everyone ever recorded as Risako was born before 2000 — so the typical Risako is around 25 today.

Median birth year
2000
About 25 years old
Biggest decade
2000s
58.1% of all use
Born in the last 25 years
100.0%
A modern name
Recorded since 1950
31
People you could plausibly meet
Choose a decade

2000s — 58.1% of all recorded uses (18).

Is Risako rising or falling?

Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.

Rank vs 1 year ago
—
Not ranked then
Rank vs 5 years ago
New entry
Not ranked then
Rank vs 10 years ago
—
Not ranked then
Births vs 10 years ago
—
Not published both years
Share of its own peak
0%
Peak was 1997 (8)
Years since peak
28
Years
Year-to-year steadiness
Very steady
0% average annual change
Best rank ever
#10,578
1997

Spellings of Risako

Risako is not the most common spelling — Risa is, with 83.1% against Risako's 0.62%.

Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.

Risako around the world

Where Risako ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.

  • England & Wales
    1996–1997
    #3,824
    in 1997

Popularity data from Office for National Statistics. ONS data under Open Government Licence v3.0.

Risako by the numbers

The raw record for each sex the name is used for.

As a girl's name

Rank in 2025
Unranked
Trend vs 5 yrs ago
—
Best rank ever
#10,578
1997
Peak year
1997
8 that year
First recorded
1997
Last recorded
2006
All-time count
31
Count in 2025
Under 5

Names similar to Risako

Matched on shared beginnings and endings, similar length, and comparable popularity.

RishviRistenSumakoRistinaHinakoRishyRissieKanakoRischelRishithaRistinRishonaNanakoMinakoMisakoMakoRikakoRishimaRishitaRishikaHanakoRissyTakakoKimako

Sibling names for Risako

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

Explore around Risako

Top names of 1997, Risako's peak yearThe 1990s in fullOther names that peaked in 1997Girls' names starting with R