translation: The igaryū came from Iga-no-kuni 伊賀国; alongside with 甲賀流 has been one of the most famous ninjutsu schools; and is now based at Cities of Iga and [its southern neighbor] Nabari.
translation: The kōkaryū/ kogaryū came from 甲賀 place of 近江国 (おうみのくに; Ōmi-no-kuni); 甲賀 as the place name was pronounced "kōka" but, when limited to ninjutsu only, has become common to be mispronounced as "kōga."
* There is City of Kōka, Shiga Prefecture 滋賀県 甲賀市. http://en.wikipedia.org/wiki/K%C5%8Dka,_Shiga
The prefecure surrounds Lake Biwa 琵琶湖 (a fresh-water lake that gave the name to 近江国).
(e) The report said, "甲贺流忍术伴家忍第21代宗家川上仁一是日本公认唯一在世的忍术大师."
伴家. Weblio, undated. http://ejje.weblio.jp/content/banke
("日本人苗字[:] 伴家；番家; 「banke」を含む例文一覧[:] He claims he is a successor of Banke Shinobi no Den (a type of ninjutsu) of Koga school and the twenty-first headmaster of Koga school. 賀流の伴家忍之伝の継承者で甲賀流伴党21代目を称している。 - Wikipedia日英京都関連文書対訳コーパス [Corpus]")
(i) myoji 名字; 苗字 【みょうじ】 (n): "surname; family name"
Remember "daimyo" in (a)? The Chinese pronunciations of kanji 名 and 苗 are pronounced the same.
(ii) The "nin" and "shinobu" are Chinese and Japanese pronunciations of the kanji 忍.
translation: Founded by 仁科大助（戸隠大助） in the final years of Heian period (794- 1185/1192), who learned asceticism at Mount Togakushi and served under KISO Yoshinaga [also known as 源 義仲 Minamoto no Yoshinaga].
(iii) 武神館 Bujinkan