1. Japanese MLR

2. International/JP MLR Issues
Have to do more with less data
Blending different languages?
Can’t necessarily filter adult
May need new/different features
Different types of queries English/Bracket/Phrase/etc
Metrics designed for English
China has lots more spam
Japan has much less spam
Germany looks 10-20% ahead of Google by DCG

3. JP MLR vs. English MLR Kanji/ Hiragana Katakana Latin (Romaji)
Baseline
7.2
7.6
9.2
JP MLR
+4%
+2%
+1%
EN MLR 0%
+3%
Google
+6%
Examples
277
231 96

4. Different features important for JP
“Linkflux”
How soon the word appears in the document
Is the first word in query in the title

5. New features for JP Query Word Length very important
Query type important
Phonetic url match
Future:
vcano match
Matching segmented chunks