# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/kunitomo-ikkansai
# Generated: 2026-09-07T20:30:33.406Z

schema: https://schema.org/Person
url: "https://fame.am/person/kunitomo-ikkansai"
name: "Kunitomo Ikkansai"
slug: "kunitomo-ikkansai"
description: "Kunitomo Ikkansai , real name Kunitomo Tōbee Yoshimasa , was a Japanese gunsmith and inventor of the late Edo period, who, after having spent several months in Edo, where he could get accustomed with Dutch wares, built Japan's first reflective telescope in 1831. It was of the Gregorian type and had a magnification of 60. He used it to make very detailed studies of sun spots and lunar topography. Four of his telescopes remain to this day."
tagline: "Gunsmith"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/KunitomoIkkansai.jpg?width=1200"
gender: "male"
country:
  name: "Japan"
  isoCode: "JP"
category:
  name: "Scientists"
  slug: "scientists"
profileType:
  name: "Scientist"
  slug: "scientist"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "1778-11-21"
deathDate: "1840-12-26"
livingStatus: "DECEASED"
scores:
  popularity:           44.37
  momentum:             0
  historical:           8.296042666666667
  currentAttention:     0
  sourceConfidence:     50.00000000000001
  profileCompleteness:  70
  trendDirection:       "FALLING"
ranks:
  global:   null
  country:  null
  category: null
sources:
  - url: "https://zh.wikipedia.org/wiki/%E5%9C%8B%E5%8F%8B%E4%B8%80%E8%B2%AB%E9%BD%8B"
    title: "國友一貫齋"
    type:  "WIKIPEDIA"
  - url: "https://ar.wikipedia.org/wiki/%D9%83%D9%88%D9%86%D9%8A%D8%AA%D9%88%D9%85%D9%88_%D8%A5%D9%8A%D9%83%D8%A7%D9%86%D8%B3%D8%A7%D9%8A"
    title: "كونيتومو إيكانساي"
    type:  "WIKIPEDIA"
  - url: "https://de.wikipedia.org/wiki/Kunitomo_Ikkansai"
    title: "Kunitomo Ikkansai"
    type:  "WIKIPEDIA"
  - url: "https://en.wikipedia.org/wiki/Kunitomo_Ikkansai"
    title: "Kunitomo Ikkansai"
    type:  "WIKIPEDIA"
  - url: "https://es.wikipedia.org/wiki/Kunitomo_Ikkansai"
    title: "Kunitomo Ikkansai"
    type:  "WIKIPEDIA"
  - url: "https://fa.wikipedia.org/wiki/%DA%A9%D9%88%D9%86%DB%8C%D8%AA%D9%88%D9%85%D9%88_%D8%A7%DA%A9%D8%A7%D9%86%D8%B3%D8%A7%DB%8C"
    title: "کونیتومو اکانسای"
    type:  "WIKIPEDIA"
  - url: "https://fr.wikipedia.org/wiki/Kunitomo_Ikkansai"
    title: "Kunitomo Ikkansai"
    type:  "WIKIPEDIA"
  - url: "https://ja.wikipedia.org/wiki/%E5%9B%BD%E5%8F%8B%E4%B8%80%E8%B2%AB%E6%96%8E"
    title: "国友一貫斎"
    type:  "WIKIPEDIA"
  - url: "https://mg.wikipedia.org/wiki/Ikkansai_Kunimoto"
    title: "Ikkansai Kunimoto"
    type:  "WIKIPEDIA"
  - url: "https://www.wikidata.org/wiki/Q1079978"
    title: "Wikidata"
    type:  "WIKIDATA"

# bio (long form, separated for readability)
bio: |
  Imported from discovery source: wikidata-dump