ICOJ has a Halaqa (basic unit) based working structure. Each Halaqa has an in charge to organize the Dawah and Tarbiyah activities. Besides he also monitors and oversees the activities of the Halaqa (basic units) falling under the respective Halaqa.
#Each Halaqa (Basic Unit) which organizes the Dawah programs in that area, like Monthly/weekly Daroos e Quran and other Dawah & Tarbiyah Programs
Our basic units and in charge are as under:
| No. | Halaqa (basic unit) | Area | In charge | Total members |
| 01 | Halaqa Hazrat Abu Bakr Al Siddique | Gyotoku Chiba pref. | Br. Huzaifa | |
| 02 | Halaqa Hazrat Usama Bin Zaid | Matsudo Chiba pref. | Br. Muhammad Ejaz | |
| 03 | Halaqa Hazrat Hussain | Mito Ibaraki pref. | Br. Atta Ur Rehman Siddiqui | |
| 04 | Halaqa Hazrat Abu Hurairah | Kanuma Tochigi pref. | Br. Faisal Sindhu | |
| 05 | Halaqa Hazrat Khalid Bin Waleed | Oyama Tochigi pref. | Br. Shad Ali | |
| 06 | Halaqa Hazrat Zaid Bin Harisa | Tatebayashi Gunma pref. | Br. Muhammad Aslam | |
| 07 | Halaqa Hazrat Zubair Bin Awam | Yokohama Kanagawa pref. | Br. Humayun Butt | |
| 08 | Halaqa Hazrat Usman e Ghani | Hatoyama Saitama pref. | Br. Asif Pasha | |
| 09 | Halaqa Hazrat Bilal e Habashi | Asakusa Tokyo | Br. Khalil Butt | |
| 10 | Halaqa Hazrat Ali Al Murtaza | Nasu Shiobara Tochigi pref. | Br. Malik Irfan | |
| 11 | Halaqa Hazrat Saad Bin Abi Waqas | Nagano pref. | Br. Nematullah Butt | |
| 12 | Temporarily Unit | Toyama | Br. Hafiz Zubair | |
| 13 | Temporarily Unit | Koriyama | Br. Arif Khan | |
| 14 | Temporarily Unit | Iwaki Fukushima pref. | Br. Raja Sabir | |
| 15 | Temporarily Unit | Sapporo Hokkaido | Br. Arif Hanif | |
| 16 | Halaqa Japanese Wing | Japan | Br. Ahmad Maeno | |
| 17 | Halaqa English Wing | Japan | Br. Muhammad Salim | |
| 18 | Halaqa Japanese Women’s Wing | Japan | Mrs. Ilyas Khan | |
| 19 | Halaqa Women’s Urdu speaking Wing | Japan | Mrs. Muhammad Yahya | |
| 20 | Halaqa Women’s English-Speaking Wing | Japan | Mrs. Ishrat Hashmi | |
| 21 | Halaqa Young Muslims Boys | Japan | Br. Abdullah Miyazawa | |
| 22 | Halaqa Young Muslims Girls | Japan | Mrs. Ilyas Khan | |
| 23 | Halaqa Next Generation | Japan | Br. Ammar Jamil | |
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