touhou
Touhou Project (東方Project) is the iconic series of (mostly) shoot 'em up (Danmaku) games created by ZUN under the company name Team Shanghai Alice.
Yukkuri originated from this series so technically the "copyright" would be that.
Even if almost all stories related to yukkuri no longer use Touhou's original characters or setting, this tag is mostly a formality used to differentiate from those yukkuri based on different franchises.
The following tags implicate this tag: reimu, reimu_(pc-98), reimu-chen, marisa, marisa_(pc-98), marisa-chen, shingyoku_(female), shingyoku_(male), genji_(character), rika, mugetsu_(character), rika_(character), meira, gengetsu, meira_(character), orange, gengetsu_(character), orange_(character), ellen, ellen_(character), kotohime, kotohime_(character), kana, kana_anaberal, rikako, kurumi, yuugenmagan, yuugenmagan_(character), kurumi_(character), elis, rikako_asakura, elis_(character), elly, sariel, sariel_(character), elly_(character), mima, chiyuri, mima_(character), yuuka, kikuri, kikuri_(character), yuuka_(pc-98), konngara, konngara_(character), mugetsu, genji, yuki_(touhou), yuki_(character), hong_meiling, mai, mai_(character), koakuma, yumeko, yumeko_(character), koakuma_(character), shinki, shinki_(character), patchouli, patchouli_knowledge, patchouli-chen, sakuya, remilia, remilia_scarlet, remilia-chen, flandre, yumemi, rumia, sokrates, sokrates_(character), rumia_(character), ruukoto, ruukoto_(character), daiyousei, mimi-chan, sara, daiyousei_(character), sara_(character), louise, cirno, louise_(character), alice, komachi, cirno_(character), alice_margatroid, alice_(pc-98), meiling, alice_margatroid_(pc-98), merlin, merlin_prismriver, layla_prismriver, youmu, konpaku_youmu, konpaku_youki, yuyuko, yuyuko-chen, suika, saigyouji_yuyuko, ibuki_suika, wriggle, wriggle_nightbug, mystia, mystia_(bird), mystia_lorelei, mystia_lorelei_(bird), ran, flandre_scarlet, keine, satsuki, yakumo_ran, satsuki_rin, letty, yukari, letty_whiterock, kamishirasawa_keine, chen, yakumo_yukari, chen_(character), lily_white, shanghai, lily_black, prismriver_sisters, shanghai_(character), lyrica, lyrica_prismriver, hourai, lunasa, lunasa_prismriver, hourai_doll, kaguya, iku, houraisan_kaguya, aki_minoriko, fujiwara_no_mokou, fujiwara_no_mokou_(phoenix), hina, nagae_iku, kagiyama_hina, nitori, tenshi, kawashiro_nitori, momiji, hinanawi_tenshi, inubashiri_momiji, sanae, kochiya_sanae, aya, tewi, aya-chen, inaba_tewi, kanako, reisen, shameimaru_aya, reisen_udongein_inaba, eirin, medicine, eirin-chen, kanako-chen, yagokoro_eirin, medicine_melancholy, yagokoro, yasaka_kanako, onozuka_komachi, suwako, eiki, shizuha, moriya_suwako, aki_shizuha, minoriko, reiuji_utsuho, reiuji_utsuho_(bird), toramaru_shou, koishi, komeiji_koishi, byakuren, nazrin, nazrin_(character), byakuren-chen, kogasa, hijiri_byakuren, nue, houjuu_nue, goliath, goliath_doll, hisoutensoku_(mecha), hatate, tatara_kogasa, kisume, himekaidou_hatate, kisume_(character), ichirin, yamame, kurodani_yamame, kumoi_ichirin, parsee, kyouko, mizuhashi_parsee, unzan, yuugi, hoshiguma_yuugi, unzan_(character), satori, komeiji_satori, murasa, rin, kaenbyou_rin, minamitsu_murasa, kaenbyou_rin_(cat), utsuho, shou, kokoro, hata_no_kokoro, sumireko, wakasagihime, wakasagihime_(character), seiran, sekibanki, sekibanki_(character), ringo, kagerou, doremy, doremy_sweet, sagume, kishin_sagume, clownpiece, clownpiece_(character), junko, imaizumi_kagerou, kasodani_kyouko, junko_(character), yoshika, benben, miyako_yoshika, seiga, yatsuhashi, seiga-chen, hecatia, kaku_seiga, seija, tojiko, soga_no_tojiko, kijin_seija, futo, mononobe_no_futo, sukuna, toyosatomimi, toyosatomimi_no_miko, sukuna_shinmyoumaru, mamizou, futatsuiwa_mamizou, raiko, morichika_rinnosuke, tokiko, tokiko_(character), lunachild, luna_child, starsapphire, star_sapphire, sunnymilk, sunny_milk, lapislazuli_hecatia, watatsuki_no_toyohime, joon, shion, watatsuki_no_yorihime, yorigami_shion, eternity_larva, kasen, nemuno, sakata_nemuno, ibaraki_kasen, aunn, komano_aunn, kosuzu, narumi, yatadera_narumi, satono, okina, eika, urumi, kicchou_yachie, saki, kurokoma_saki, and rinnosuke (learn more).