diff --git a/corpus/llm-jp-corpus-v4/ja/ja_kokkai_giji/.gitignore b/corpus/llm-jp-corpus-v4/ja/ja_kokkai_giji/.gitignore
new file mode 100644
index 00000000..4722719a
--- /dev/null
+++ b/corpus/llm-jp-corpus-v4/ja/ja_kokkai_giji/.gitignore
@@ -0,0 +1,7 @@
+# python generated files
+__pycache__/
+*.py[oc]
+build/
+dist/
+wheels/
+*.egg-info
diff --git a/corpus/llm-jp-corpus-v4/ja/ja_kokkai_giji/README.md b/corpus/llm-jp-corpus-v4/ja/ja_kokkai_giji/README.md
new file mode 100644
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+++ b/corpus/llm-jp-corpus-v4/ja/ja_kokkai_giji/README.md
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+# ja-kokkai-giji
+
+Preprocess text from Kokkai Giji-roku.
+
+## Environment
+
+- Python 3.12.5
+
+## Usage
+
+To preprocess text from Kokkai Giji-roku, run the following command:
+
+```bash
+python format.py --input-dir <input-dir> --output-file <output-file>
+```
diff --git a/corpus/llm-jp-corpus-v4/ja/ja_kokkai_giji/format.py b/corpus/llm-jp-corpus-v4/ja/ja_kokkai_giji/format.py
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+++ b/corpus/llm-jp-corpus-v4/ja/ja_kokkai_giji/format.py
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+"""Preprocess the Kokkai Giji corpus.
+
+Usage:
+    python format.py --input-dir /path/to/input --output-file /path/to/output
+"""
+import argparse
+import dataclasses
+import json
+import logging
+import pathlib
+from typing import Optional, Any
+
+
+@dataclasses.dataclass
+class SpeechRecord:
+    speechID: str
+    speechOrder: int
+    speaker: str
+    speakerYomi: Optional[str]
+    speakerGroup: Optional[str]
+    speakerPosition: Optional[str]
+    speakerRole: Optional[str]
+    speech: str
+    startPage: int
+    createTime: str
+    updateTime: str
+    speechURL: str
+
+
+@dataclasses.dataclass
+class MeetingRecord:
+    issueID: str
+    imageKind: str
+    searchObject: int
+    session: int
+    nameOfHouse: str
+    nameOfMeeting: str
+    issue: str
+    date: str
+    closing: Any
+    speechRecord: list[SpeechRecord]
+    meetingURL: str
+    pdfURL: str
+
+    def __post_init__(self):
+        self.speechRecord = [SpeechRecord(**speech) for speech in self.speechRecord]
+
+
+@dataclasses.dataclass
+class KokkaiGiji:
+    numberOfRecords: int
+    numberOfReturn: int
+    startRecord: int
+    nextRecordPosition: Optional[int]
+    meetingRecord: list[MeetingRecord]
+
+    def __post_init__(self):
+        self.meetingRecord = [MeetingRecord(**meeting) for meeting in self.meetingRecord]
+
+
+def meeting_to_text(meeting: MeetingRecord) -> str:
+    text = ""
+    for speech in meeting.speechRecord:
+        text += speech.speech.replace("\r\n", "\n").strip() + "\n\n"
+    return text.strip()
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser("Remove intra-sentence line breaks from text.")
+    parser.add_argument("--input-dir", type=str, required=True, help="Input directory.")
+    parser.add_argument("--output-file", type=str, required=True, help="Output file.")
+    parser.add_argument(
+        "--overwrite", action="store_true", help="Overwrite output file."
+    )
+    args = parser.parse_args()
+
+    input_dir = pathlib.Path(args.input_dir)
+    file_paths = input_dir.glob("**/*.json")
+
+    output_file = pathlib.Path(args.output_file)
+
+    with output_file.open("wt", encoding="utf-8") as fout:
+        for file_path in file_paths:
+            logging.info(f"Processing {file_path}")
+            with file_path.open("rt", encoding="utf-8") as fin:
+                dat = KokkaiGiji(**json.load(fin))
+            
+            for meeting in dat.meetingRecord:
+                instance = {
+                    "text": meeting_to_text(meeting),
+                    "meta": {
+                        "issueID": meeting.issueID,
+                        "imageKind": meeting.imageKind,
+                        "searchObject": meeting.searchObject,
+                        "session": meeting.session,
+                        "nameOfHouse": meeting.nameOfHouse,
+                        "nameOfMeeting": meeting.nameOfMeeting,
+                        "issue": meeting.issue,
+                        "date": meeting.date,
+                        "closing": meeting.closing,
+                        "meetingURL": meeting.meetingURL,
+                        "pdfURL": meeting.pdfURL,
+                    },
+                }
+                fout.write(json.dumps(instance, ensure_ascii=False) + "\n")
+
+
+if __name__ == "__main__":
+    logging.basicConfig(
+        format="%(asctime)s - %(levelname)s - %(name)s - %(message)s",
+        level=logging.INFO,
+    )
+    main()