diff --git a/rikaidb.go b/rikaidb.go
new file mode 100644
index 0000000..041b1df
--- /dev/null
+++ b/rikaidb.go
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2016 Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package main
+
+import (
+	"os"
+	"strings"
+)
+
+const RIKAI_REVISION = "rikai1"
+
+func rikaiBuildRules(term *dbTerm) {
+	for _, tag := range term.Tags {
+		switch tag {
+		case "adj-i", "v1", "vk":
+			term.addRules(tag)
+		default:
+			if strings.HasPrefix(tag, "v5") {
+				term.addRules("v5")
+			} else if strings.HasPrefix(tag, "vs") {
+				term.addRules("vs")
+			}
+		}
+	}
+}
+
+func rikaiBuildScore(term *dbTerm) {
+	term.Score = 0
+	for _, tag := range term.Tags {
+		switch tag {
+		case "P":
+			term.Score += 5
+		case "arch", "iK":
+			term.Score -= 1
+		}
+	}
+}
+
+func rikaiBuildTagMeta(entities map[string]string) map[string]dbTagMeta {
+	tags := map[string]dbTagMeta{
+		"news": {Notes: "appears frequently in Mainichi Shimbun", Category: "frequent", Order: -2},
+		"ichi": {Notes: "listed as common in Ichimango Goi Bunruishuu", Category: "frequent", Order: -2},
+		"spec": {Notes: "common words not included in frequency lists", Category: "frequent", Order: -2},
+		"gai":  {Notes: "common loanword", Category: "frequent", Order: -2},
+		"P":    {Notes: "popular term", Category: "popular", Order: -10},
+	}
+
+	for name, value := range entities {
+		tag := dbTagMeta{Notes: value}
+
+		switch name {
+		case "exp", "id":
+			tag.Category = "expression"
+			tag.Order = -5
+		case "arch", "iK":
+			tag.Category = "archaism"
+			tag.Order = -5
+		}
+
+		tags[name] = tag
+	}
+
+	return tags
+}
+
+func rikaiExtractTerms(edictEntry rikai.rikaiEntry) []dbTerm {
+
+	return terms
+}
+
+func rikaiExportDb(inputPath, outputDir, title string, stride int, pretty bool) error {
+	reader, err := os.Open(inputPath)
+	if err != nil {
+		return err
+	}
+	defer reader.Close()
+
+	dict, entities, err := rikai.LoadrikaiNoTransform(reader)
+	if err != nil {
+		return err
+	}
+
+	var terms dbTermList
+	for _, entry := range dict.Entries {
+		terms = append(terms, rikaiExtractTerms(entry)...)
+	}
+
+	if title == "" {
+		title = "rikai"
+	}
+
+	return writeDb(
+		outputDir,
+		title,
+		RIKAI_REVISION,
+		terms.crush(),
+		nil,
+		rikaiBuildTagMeta(entities),
+		stride,
+		pretty,
+	)
+}