diff --git a/src/ja/raw18/build.gradle b/src/ja/raw18/build.gradle
new file mode 100644
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--- /dev/null
+++ b/src/ja/raw18/build.gradle
@@ -0,0 +1,10 @@
+ext {
+    extName = 'Raw18'
+    extClass = '.Raw18'
+    themePkg = 'wpcomics'
+    baseUrl = 'https://raw18.net'
+    overrideVersionCode = 0
+    isNsfw = true
+}
+
+apply from: "$rootDir/common.gradle"
diff --git a/src/ja/raw18/res/mipmap-hdpi/ic_launcher.png b/src/ja/raw18/res/mipmap-hdpi/ic_launcher.png
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diff --git a/src/ja/raw18/res/mipmap-xxxhdpi/ic_launcher.png b/src/ja/raw18/res/mipmap-xxxhdpi/ic_launcher.png
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diff --git a/src/ja/raw18/src/eu/kanade/tachiyomi/extension/ja/raw18/Raw18.kt b/src/ja/raw18/src/eu/kanade/tachiyomi/extension/ja/raw18/Raw18.kt
new file mode 100644
index 000000000..38a6d5023
--- /dev/null
+++ b/src/ja/raw18/src/eu/kanade/tachiyomi/extension/ja/raw18/Raw18.kt
@@ -0,0 +1,134 @@
+package eu.kanade.tachiyomi.extension.ja.raw18
+
+import eu.kanade.tachiyomi.multisrc.wpcomics.WPComics
+import eu.kanade.tachiyomi.network.GET
+import eu.kanade.tachiyomi.source.model.FilterList
+import eu.kanade.tachiyomi.source.model.SChapter
+import eu.kanade.tachiyomi.source.model.SManga
+import okhttp3.HttpUrl.Companion.toHttpUrl
+import okhttp3.Request
+import org.jsoup.nodes.Document
+import org.jsoup.nodes.Element
+import java.text.SimpleDateFormat
+import java.util.Calendar
+import java.util.Locale
+
+class Raw18 : WPComics("Raw18", "https://raw18.net", "ja", SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSSSS'Z'", Locale.JAPANESE), null) {
+    override val searchPath = "search/manga"
+
+    override val genresUrlDelimiter = "="
+
+    private val regex = Regex("([0-9]+)(.+)")
+
+    override fun popularMangaSelector() = "div.items article.item"
+
+    override fun popularMangaNextPageSelector() = "li:nth-last-child(2) a.page-link"
+
+    override fun searchMangaSelector() = popularMangaSelector()
+
+    override fun mangaDetailsParse(document: Document): SManga {
+        return SManga.create().apply {
+            document.selectFirst("article#item-detail").let { info ->
+                author = info?.selectFirst("li.author p.col-xs-8")?.text()
+                status = info?.selectFirst("li.status p.col-xs-8")?.text().toStatus()
+                genre = info?.select("li.kind p.col-xs-8 a")?.joinToString { it.text() }
+                description = info?.selectFirst("div.detail-content")?.text()
+                thumbnail_url = imageOrNull(info?.selectFirst("div.col-image img")!!)
+            }
+        }
+    }
+
+    override fun searchMangaRequest(page: Int, query: String, filters: FilterList): Request {
+        val url = "$baseUrl/search/manga".toHttpUrl().newBuilder().apply {
+            filters.ifEmpty { getFilterList() }.forEach { filter ->
+                when (filter) {
+                    is GenreFilter -> filter.toUriPart()?.let { addQueryParameter("genre", it) }
+                    is StatusFilter -> filter.toUriPart()?.let { addQueryParameter("status", it) }
+                    else -> {}
+                }
+            }
+            addQueryParameter(queryParam, query)
+            addQueryParameter("page", page.toString())
+        }.build()
+
+        return GET(url, headers)
+    }
+
+    override fun chapterFromElement(element: Element): SChapter {
+        val chapterDate = element.selectFirst("div.col-xs-4")!!.text()
+        return SChapter.create().apply {
+            element.selectFirst("a").let {
+                name = it!!.text()
+                setUrlWithoutDomain(it.absUrl("href"))
+                date_upload = chapterDate.toDate()
+            }
+        }
+    }
+
+    override fun String?.toDate(): Long {
+        val minuteWords = listOf("minute", "分")
+        val hourWords = listOf("hour", "時間")
+        val dayWords = listOf("day", "日")
+        val weekWords = listOf("week", "週間")
+        val monthWords = listOf("month", "月")
+
+        try {
+            val (firstMatch, secondMatch) = regex.matchEntire(this!!.substringBefore("前"))!!.destructured
+            val trimmedDate = listOf(firstMatch, secondMatch)
+            val calendar = Calendar.getInstance()
+            when {
+                monthWords.any {
+                    trimmedDate[1].contains(
+                        it,
+                        ignoreCase = true,
+                    )
+                } -> calendar.apply { add(Calendar.MONTH, -trimmedDate[0].toInt()) }
+                weekWords.any {
+                    trimmedDate[1].contains(
+                        it,
+                        ignoreCase = true,
+                    )
+                } -> calendar.apply { add(Calendar.WEEK_OF_MONTH, -trimmedDate[0].toInt()) }
+                dayWords.any {
+                    trimmedDate[1].contains(
+                        it,
+                        ignoreCase = true,
+                    )
+                } -> calendar.apply { add(Calendar.DAY_OF_MONTH, -trimmedDate[0].toInt()) }
+                hourWords.any {
+                    trimmedDate[1].contains(
+                        it,
+                        ignoreCase = true,
+                    )
+                } -> calendar.apply { add(Calendar.HOUR_OF_DAY, -trimmedDate[0].toInt()) }
+                minuteWords.any {
+                    trimmedDate[1].contains(
+                        it,
+                        ignoreCase = true,
+                    )
+                } -> calendar.apply { add(Calendar.MINUTE, -trimmedDate[0].toInt()) }
+            }
+            return calendar.timeInMillis
+        } catch (_: Exception) {
+            return 0L
+        }
+    }
+
+    override fun getStatusList(): List<Pair<String?, String>> {
+        return listOf(
+            Pair(null, "全て"),
+            Pair("ongoing", "Ongoing"),
+        )
+    }
+
+    override fun parseGenres(document: Document): List<Pair<String?, String>> {
+        return buildList {
+            add(null to "全てのジャンル")
+            document.select(genresSelector).mapTo(this) { element ->
+                element.attr("href")
+                    .removeSuffix("/")
+                    .substringAfterLast(genresUrlDelimiter) to element.text()
+            }
+        }
+    }
+}