diff --git a/src/ja/mangagun/build.gradle b/src/ja/mangagun/build.gradle
new file mode 100644
index 000000000..5dff7042a
--- /dev/null
+++ b/src/ja/mangagun/build.gradle
@@ -0,0 +1,9 @@
+ext {
+    extName = 'MangaGun'
+    extClass = '.MangaGun'
+    themePkg = 'fmreader'
+    baseUrl = 'https://mangagun.net'
+    overrideVersionCode = 0
+}
+
+apply from: "$rootDir/common.gradle"
diff --git a/src/ja/mangagun/res/mipmap-hdpi/ic_launcher.png b/src/ja/mangagun/res/mipmap-hdpi/ic_launcher.png
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diff --git a/src/ja/mangagun/res/mipmap-xhdpi/ic_launcher.png b/src/ja/mangagun/res/mipmap-xhdpi/ic_launcher.png
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diff --git a/src/ja/mangagun/res/mipmap-xxhdpi/ic_launcher.png b/src/ja/mangagun/res/mipmap-xxhdpi/ic_launcher.png
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diff --git a/src/ja/mangagun/res/mipmap-xxxhdpi/ic_launcher.png b/src/ja/mangagun/res/mipmap-xxxhdpi/ic_launcher.png
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diff --git a/src/ja/mangagun/src/eu/kanade/tachiyomi/extension/ja/mangagun/MangaGun.kt b/src/ja/mangagun/src/eu/kanade/tachiyomi/extension/ja/mangagun/MangaGun.kt
new file mode 100644
index 000000000..90fdc0d87
--- /dev/null
+++ b/src/ja/mangagun/src/eu/kanade/tachiyomi/extension/ja/mangagun/MangaGun.kt
@@ -0,0 +1,121 @@
+package eu.kanade.tachiyomi.extension.ja.mangagun
+
+import eu.kanade.tachiyomi.multisrc.fmreader.FMReader
+import eu.kanade.tachiyomi.network.GET
+import eu.kanade.tachiyomi.network.asObservableSuccess
+import eu.kanade.tachiyomi.source.model.Page
+import eu.kanade.tachiyomi.source.model.SChapter
+import eu.kanade.tachiyomi.source.model.SManga
+import eu.kanade.tachiyomi.util.asJsoup
+import okhttp3.Cookie
+import okhttp3.HttpUrl.Companion.toHttpUrl
+import okhttp3.Request
+import org.jsoup.nodes.Document
+import rx.Observable
+import java.util.Calendar
+
+private const val DOMAIN = "mangagun.net"
+
+class MangaGun : FMReader("MangaGun", "https://$DOMAIN", "ja") {
+    override val infoElementSelector = "div.row div.row"
+
+    // source is picky about URL format
+    private fun mangaRequest(sortBy: String, page: Int): Request {
+        return GET(
+            "$baseUrl/manga-list.html?listType=pagination&page=$page&artist=&author=&group=&m_status=&name=&genre=&ungenre=&magazine=&sort=$sortBy&sort_type=DESC",
+            headers,
+        )
+    }
+
+    override fun popularMangaRequest(page: Int): Request = mangaRequest("views", page)
+
+    override fun latestUpdatesRequest(page: Int): Request = mangaRequest("last_update", page)
+
+    override fun fetchChapterList(manga: SManga): Observable<List<SChapter>> {
+        val slug = manga.url.substringAfter("manga-").substringBefore(".html")
+
+        return client.newCall(
+            GET(
+                "$baseUrl/app/manga/controllers/cont.Listchapter.php?slug=$slug",
+                headers,
+            ),
+        )
+            .asObservableSuccess()
+            .map { res ->
+                res.asJsoup().select(".at-series a").map {
+                    SChapter.create().apply {
+                        name = it.select(".chapter-name").text()
+                        url = it.attr("abs:href").substringAfter("controllers")
+                        date_upload = parseChapterDate(it.select(".chapter-time").text())
+                    }
+                }
+            }
+    }
+
+    private fun parseChapterDate(date: String): Long {
+        val value = date.split(' ')[dateValueIndex].toInt()
+        val chapterDate = Calendar.getInstance().apply {
+            set(Calendar.SECOND, 0)
+            set(Calendar.MILLISECOND, 0)
+        }
+
+        when (date.split(' ')[dateWordIndex]) {
+            "mins", "minutes" -> chapterDate.add(Calendar.MINUTE, value * -1)
+            "hours" -> chapterDate.add(Calendar.HOUR_OF_DAY, value * -1)
+            "days" -> chapterDate.add(Calendar.DATE, value * -1)
+            "weeks" -> chapterDate.add(Calendar.DATE, value * 7 * -1)
+            "months" -> chapterDate.add(Calendar.MONTH, value * -1)
+            "years" -> chapterDate.add(Calendar.YEAR, value * -1)
+            else -> return 0
+        }
+
+        return chapterDate.timeInMillis
+    }
+
+    private fun handleDdosProtect(document: Document): Document {
+        val key = document.select("script:containsData(document.cookie)").first()?.html()
+            ?.substringAfter("escape('")?.substringBefore("'")
+        if (key != null) {
+            // save cookie ct_anti_ddos_key
+            client.cookieJar.saveFromResponse(
+                baseUrl.toHttpUrl(),
+                listOf(
+                    Cookie.Builder()
+                        .name("ct_anti_ddos_key")
+                        .value(key)
+                        .domain(DOMAIN)
+                        .path("/")
+                        .build(),
+                ),
+            )
+        }
+        return document.select("noscript div a").attr("abs:href").let { url ->
+            client.newCall(GET(url, headers)).execute().asJsoup()
+        }
+    }
+
+    override fun pageListParse(document: Document): List<Page> {
+        val ddosProtect = document.select("title").first()?.text()
+            ?.contains("Manga Gun - DDoS protection") ?: false
+        return if (ddosProtect) {
+            handleDdosProtect(document)
+        } else {
+            document
+        }.select("script:containsData(load_image)")
+            .html()
+            .substringAfter("(")
+            .substringBefore(",")
+            .let { cid ->
+                client.newCall(
+                    GET(
+                        "$baseUrl/app/manga/controllers/cont.Showimage.php?cid=$cid",
+                        headers,
+                    ),
+                ).execute().asJsoup()
+            }
+            .select(".lazyload")
+            .mapIndexed { i, e ->
+                Page(i, "", e.attr("abs:data-src"))
+            }
+    }
+}