diff --git a/docs/configuration.rst b/docs/configuration.rst
index e830066f..022e3c52 100644
--- a/docs/configuration.rst
+++ b/docs/configuration.rst
@@ -1058,7 +1058,8 @@ Description
 extractor.*.postprocessors
 --------------------------
 Type
-    ``list`` of |Postprocessor Configuration|_ objects
+    * |Postprocessor Configuration|_ object
+    * ``list`` of |Postprocessor Configuration|_ objects
 Example
     .. code:: json
 
@@ -2363,6 +2364,18 @@ Description
     * ``"hitomi"``:  Download the corresponding gallery from ``hitomi.la``
 
 
+extractor.exhentai.tags
+-----------------------
+Type
+    ``bool``
+Default
+    ``false``
+Description
+    Group ``tags`` by type and
+    provide them as ``tags_<type>`` metadata fields,
+    for example ``tags_artist`` or ``tags_character``.
+
+
 extractor.fanbox.comments
 -------------------------
 Type
@@ -3032,6 +3045,18 @@ Description
     | ``"780"``, ``"980"``, ``"1280"``, ``"1600"``, ``"0"`` (original)
 
 
+extractor.koharu.tags
+---------------------
+Type
+    ``bool``
+Default
+    ``false``
+Description
+    Group ``tags`` by type and
+    provide them as ``tags_<type>`` metadata fields,
+    for example ``tags_artist`` or ``tags_character``.
+
+
 extractor.lolisafe.domain
 -------------------------
 Type
@@ -5156,8 +5181,9 @@ Type
 Default
     ``false``
 Description
-    Categorize tags by their respective types
-    and provide them as ``tags_<type>`` metadata fields.
+    Group ``tags`` by type and
+    provide them as ``tags_<type>`` metadata fields,
+    for example ``tags_artist`` or ``tags_character``.
 
     Note: This requires 1 additional HTTP request per post.
 
diff --git a/gallery_dl/extractor/koharu.py b/gallery_dl/extractor/koharu.py
index 7c04dcb1..b60157ed 100644
--- a/gallery_dl/extractor/koharu.py
+++ b/gallery_dl/extractor/koharu.py
@@ -11,6 +11,7 @@
 from .common import GalleryExtractor, Extractor, Message
 from .. import text, exception
 from ..cache import cache
+import collections
 
 BASE_PATTERN = (
     r"(?i)(?:https?://)?("
@@ -108,14 +109,24 @@ class KoharuGalleryExtractor(KoharuExtractor, GalleryExtractor):
         url = "{}/books/detail/{}/{}".format(
             self.root_api, self.groups[1], self.groups[2])
         self.data = data = self.request(url, headers=self.headers).json()
+        data["date"] = text.parse_timestamp(data["created_at"] // 1000)
 
         tags = []
-        for tag in data["tags"]:
+        types = self.TAG_TYPES
+        tags_data = data["tags"]
+
+        for tag in tags_data:
             name = tag["name"]
             namespace = tag.get("namespace", 0)
-            tags.append(self.TAG_TYPES[namespace] + ":" + name)
+            tags.append(types[namespace] + ":" + name)
         data["tags"] = tags
-        data["date"] = text.parse_timestamp(data["created_at"] // 1000)
+
+        if self.config("tags", False):
+            tags = collections.defaultdict(list)
+            for tag in tags_data    :
+                tags[tag.get("namespace", 0)].append(tag["name"])
+            for type, values in tags.items():
+                data["tags_" + types[type]] = values
 
         try:
             if self.cbz:
diff --git a/test/results/koharu.py b/test/results/koharu.py
index 8ba22146..0aed25f6 100644
--- a/test/results/koharu.py
+++ b/test/results/koharu.py
@@ -12,6 +12,7 @@ __tests__ = (
     "#url"     : "https://niyaniya.moe/g/14216/6c67076fdd45",
     "#category": ("", "koharu", "gallery"),
     "#class"   : koharu.KoharuGalleryExtractor,
+    "#options" : {"tags": True},
     "#pattern" : r"https://kisakisexo.xyz/download/59896/a4fbd1828229/f47639c6abaf1903dd69c36a3d961da84741a1831aa07a2906ce9c74156a5d75\?v=1721626410802&w=0",
     "#count"   : 1,
 
@@ -43,6 +44,36 @@ __tests__ = (
         "other:uncensored",
         "other:vanilla",
     ],
+    "tags_artist": [
+        "ouchi kaeru",
+    ],
+    "tags_female": [
+        "busty",
+    ],
+    "tags_general": [
+        "beach",
+        "booty",
+        "dark skin",
+        "fingering",
+        "handjob",
+        "light hair",
+        "nakadashi",
+        "outdoors",
+        "ponytail",
+        "swimsuit",
+        "x-ray",
+    ],
+    "tags_language": [
+        "english",
+        "translated",
+    ],
+    "tags_magazine": [
+        "comic kairakuten 2024-08",
+    ],
+    "tags_other": [
+        "uncensored",
+        "vanilla",
+    ],
     "title"     : "[Ouchi Kaeru] Summer Business (Comic Kairakuten 2024-08)",
     "updated_at": 1721626410802,
 },