Japan scored the highest in the OECD in science in PISA 2015, with a mean score of 538 points, compared to the OECD average of 493 points. Performance in science remained stable across PISA cycles, with an average score change of 2.8 score points, while reading performance has increased and mathematics performance has stayed the same. Socio-economic status had lower-than-average impact on science performance in PISA 2015, explaining 10.1% of the variance in performance (OECD average: 12.9%). The impact of ESCS on performance in science has not changed since 2006. Gender differences in science performance were among the highest in the OECD, with a difference between boys and girls of 14 points, compared to the average difference across the OECD of 4 points. Immigrant students make up 0.5% of the student population of 15-year-olds in Japan, a proportion which is among the lowest in the OECD (OECD average: 12.5%).
Enrolment of 3-year-olds in ECEC and pre-primary education was close to the OECD average in 2015, at 79.8% (OECD average: 77.8%). Pre-primary education is organised by categories: integrated centre for ECEC (Yohorenkeigata-Nintei-Kodomo-En), kindergarten (Yochien), kindergarten division of school for special needs education (Tokubetsu-shien-gakko Yochi-bu) and day nursery (Hoikusho). Each programme lasts from one to three years. Children can begin attending these programmes as early as age 3 and as late as age 5. A set of national standards is in place for the education of 3-5 year-olds (National Curriculum Standard for Kindergarten). Both education-only and integrated programmes exist nationally. A formal curriculum is in place for education‑only programmes and is delivered by qualified teachers. This varies for integrated programmes. Compulsory education in Japan begins at age 6 and ends at age 15, shorter than the typical duration across the OECD. Students are first tracked into different educational pathways at age 15, later than the OECD average of age 14. Upper secondary education is divided into four streams: general programmes (three years), specialised programmes (three years), integrated programmes (three years) and upper secondary specialised training school (not less than one year). All programmes award students either a certificate of graduation (general, specialised and integrated programmes) or a certificate of completion (upper secondary specialised training school) and provide access to higher education (except for upper secondary specialised training school programmes of less than three years).
VET in Japan is provided at the upper secondary and tertiary levels. In the OECD Survey of Adult Skills in 2012 and 2015, adult literacy scores in Japan were the highest in the OECD, at 296 points, compared to the OECD average of 268 points. The gap in literacy skills between older adults (age 55-65) and younger adults (age 25-34) was among the highest in the OECD. The percentage of the population aged 25-34 with a tertiary-level qualification is among the highest in the OECD, at 60.1% in 2016, compared to the OECD average of 43.1%. Employment rates for 25-34 year-olds with tertiary education are higher than the OECD average. In 2016, 85.4% were employed, while the OECD average rate was 82.9%.