Here's one diaspora entry for my TL in the works
Japanese People in Portugal (Nipo-Portugueses, Nikkei Porutugaru-jin, 日系ポルトガル人)
Language: Mostly Japanese (Kyushu dialect) as first language, Portuguese as second language
Ancestry: 1st (pre-1954) wave - Japanese Catholics from Takasago
[1], existing colonies, small trickle from OTL Nagasaki and Saga Prefectures, 2nd (post-Salazar) wave - migrants from all over Kyushu and Formosa, including Luso-Japanese migrants
[2]
Appearance: Just like any ordinary Japanese, but Luso-Japanese migrants have a mix of Japonic and Iberian facial features
Religion: Predominantly Roman Catholic with Shinto influences
POD/History: The Aviz dynasty survives and the Kingdom of Portugal continues its ambitions with Japan as a result, leading to Kyushu partially exempt from Sakoku by the Tokugawa era under an
alternate shogun. When the Portuguese first made contact with Japan in 1543, a large-scale slave trade developed in which Portugal purchased Japanese slaves and sold them to locations overseas, including Metropolitan Portugal. King Sebastian banned it in 1571, fearing that it might make a negative impact in spreading Catholicism in Japan. Due to Sebastian surviving in a Portuguese victory in Álcacer Quibir, the 1571 ban was strictly enforced, which improved relations between him and Toyotomi Hideyoshi. By the time the Tokugawa era kicked in, a treaty was signed in Edo in 1634 between the Portuguese and Japanese dignitaries that allowed missionaries to stay in Kyushu and the Portuguese gaining significant concessions, with Nagasaki, Hirado and the islands of Tsushima and Tanegashima being part of Portugal until the Meiji Restoration. Despite strict emigration quotas established by the bakufu as a result of the Edo Treaty, the Japanese Catholics from Kyushu have created a strong overseas community across Portugal's Asian colonies. The Portuguese even encouraged Kyushuan migration to its colony in Formosa (which will be in my next entry).
In the beginning of the 20th century, small communities of Japanese people have formed in Portugal, mostly from Formosa and its community of Kirishitan-jin (overseas Kyushuans) from its colonies, with some emigration coming from OTL Nagasaki and Saga prefectures due to the Portuguese influence in Hizen province in the past, especially with mixed Luso-Japanese migrants hailing from there. By the time Prime Minister António de Oliveira Salazar died from a stroke in 1954, there were 45,000 Japanese living in Metropolitan Portugal, and his successor Francisco Craveiro Lopes signed legislation that would encourage more Japanese, as well as Ryukyuan immigration to Metropolitan Portugal during the last years of the Estado Novo regime; however, huge scale immigration finally kicked in after Portugal's first free post-Salazar elections in 1958 which Humberto Delgado was elected as prime minister, the newer migrants coming directly from all over Kyushu, due to the island's religious and foreign ties with the Portuguese, as well from Formosa. As the number of migrants continued to grow, social institutions formed in order to serve the growing Japanese community with the help of the Catholic Church, but it varies between certain waves and origins of such migrants. Established migrants from the Estado Novo era were already familiar with the Portuguese language and culture and formed community associations and a Japanese newspaper to better assist newer immigrants in adjusting to a new life in Portugal. Informal social networks headed by earlier arrivals helped newer immigrants in employment needs, often under established Japanese migrant entrepreneurs
Space: 300,000, making it the third largest overseas Japanese population in the world after Brazil and the United States. Mostly around the Lisbon and Porto Metropolitan areas, the former concentrated mostly in Amadora (which has Lisbon's Japantown/Nihonmachi) and Odivelas, the latter scattered around Vila Nova de Gaia, Gondomar, Maia and Matosinhos, and in Aveiro (due to its developing role as Portugal's Silicon Valley) with smaller communities in Coimbra, Évora, Braga, Guimarães and Viseu.
Culture: OTL Japanese culture with some Portuguese influences
[1] ATL Japanese name for Formosa
[2] See post
#154