A study about the effect of "kanji" training on cognitive function

Effects of "kanji" training on patients with mild cognitive impairment and mild dementia: a randomized controlled trial - KKP-CT

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000046172

Enrollment

100

Registered

2021-12-01

Start date

2022-03-01

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

mild cognitive impairment, mild dementia

Interventions

&quot

kanji&quot

training: to voluntarily work on the &quot

assignments given every two months for 6 months independently control without any interventions

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1) The patients with persistent cognitive decline detected by themselves or family members. 2) The patients diagnosed by neurologist as mild cognitive impairment (MCI) or dementia in the early stage. 3) the dose and usage of dementia medications are stable for at least 12 weeks before the participation 4) the mother language is Japanese

Exclusion criteria

Exclusion criteria: 1) the patients with a moderate or severe psychiatric disease such as depression 2) the patients with difficulty in psychological test or "kanji" training, for example with visual or hearing impairment or language disorders. 3) the patients with difficulty in the participation by comorbid medical diseases. 4) The patients with a brain organic lesions or significant abnormal findings in the blood tests.

Design outcomes

Primary

Measure	Time frame
MMSE-J score(before, immediately after and 6-months after the cognitive training)	—

Secondary

Measure	Time frame
1. ADAS (Alzheimer's Disease Assessment Scale) score 2. the score of Logical Memory Test from WMS-R (Wecheler Memory Scale Revised) 3. the score of Block Design from WAIS-IV (Wechsler Adult Intelligence Scale-4th edition) 4. TMT-J (Trail Making Test-Japanese) score 5. WF (verbal fluency test) score 6. JART (Japanese Adult Reading Test) score 7. DEMQOL, the assessment health-related quality of life, score 8. the achievement rate and accuracy of "kanji" training 9. the Questionnaire about the habit of "kanji" training 10. the questionnaire about writing habit 11. the score of 20 questions of "kanji"	—

Measure

Time frame

1. ADAS (Alzheimer's Disease Assessment Scale) score 2. the score of Logical Memory Test from WMS-R (Wecheler Memory Scale Revised) 3. the score of Block Design from WAIS-IV (Wechsler Adult Intelligence Scale-4th edition) 4. TMT-J (Trail Making Test-Japanese) score 5. WF (verbal fluency test) score 6. JART (Japanese Adult Reading Test) score 7. DEMQOL, the assessment health-related quality of life, score 8. the achievement rate and accuracy of "kanji" training 9. the Questionnaire about the habit of "kanji" training 10. the questionnaire about writing habit 11. the score of 20 questions of "kanji"

—

Countries

Japan

Contacts

Public ContactSakiho Ueda

Kyoto University Hospital Department of Neurology

sakiho@kuhp.kyoto-u.ac.jp075-751-3460

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026

A study about the effect of &quot;kanji&quot; training on cognitive function